Jeanie dowiaduje się, że jest nosicielką wirusa HIV, ale nie chce informować o tym kierownictwa szpitala. Jej były kochanek dr Peter Benton otrzymuje negatywny wynik testu.

Jeanie rozpoczyna leczenie na HIV. Niedługo potem Benton odsyła ją z sali, na której leży zakrwawiony pacjent. Między Greenem i Lewis coraz bardziej iskrzy. Szpital County General ma nowego ordynatora.

Carter podpada dr Anspaugh, który widzi, że jego młodszy kolega błędnie diagnozuje stan pacjenta jako poważny, by mógł go zoperować. Weaver obserwuje, jak Jeanie zachowuje się w obecności ciężko rannych pacjentów.

Życie prywatne Rossa prowadzi do tragedii. Hathaway zastanawia się nad studiami medycznymi. Carter denerwuje Bentona, bo robi dobre wrażenie na dr Keaton.

Podczas burzy w Halloween Hathaway i Ross jadą do biednych dzielnic, gdzie udzielają darmowych porad medycznych. Greene i Lewis bawią się razem na zorganizowanym na ostrym dyżurze przyjęciu halloweenowym.

Lewis chce pokonać swój strach przed lataniem i wsiada do helikoptera z ratownikami medycznymi i Greenem, żeby pomóc im ratować ofiary wypadku. Jeanie i Doyle trzymają zwłoki zmarłego mężczyzny na lodzie, żeby je zakonserwować.

Benton czuwa nad chorym dzieckiem, które jest w stanie krytycznym. Greene martwi się, że Lewis spotyka się z Morgensternem, ale Lewis wyjaśnia mu, że Morgenstern obiecał jej pomóc znaleźć pracę w szpitalu w Arizonie.

Pielęgniarka Lydia Wright i policjant Al Grabarsky biorą ślub. Mąż Jeannie w końcu zgadza się na rozwód. Carol narzeka, że pielęgniarki są za bardzo obciążone pracą i zostaje nowym członkiem rady pracowniczej.

Greene przegląda akta osobowe Jeanie i poznaje jej tajemnice. Niedługo potem dowiaduje się, że Al jest HIV-pozytywny. Keaton przypomina Carterowi, że ich związek jest tylko układem, a ona zamierza wyjechać do Pakistanu, żeby uczyć tam studentów.

Jeannie informuje swoich kolegów z pracy, że jest nosicielką wirusa HIV. Ross zaprzyjaźnia się z 14-letnią bezdomną dziewczynką o imieniu Charlie. Zabiera ją do domu Hathaway, gdzie cała rodzina obchodzi prawosławne święta Bożego Narodzenia.

Benton naciska na Ganta, który ma wrażenie, że nie jest sprawiedliwie traktowany. Carter ignoruje Ganta, bo ma dosyć jego ciągłego narzekania. Greene i pielęgniarka Chuny zaczynają ze sobą flirtować i niedługo potem konsumują swój związek.

Carter jest przybity i czuje się winny śmierci Ganta, choć policja twierdzi, że był to wypadek. Carter wyrzuca Bentonowi jego obojętność. Ross nie zgadza się zostać prawnym opiekunem Charlie.

Carol wyznaje dziennikarzowi, że popełniła fatalny w skutkach błąd i zostaje zawieszona w obowiązkach przez władze szpitala. Benton dowiaduje się, że Carly, jego dziewczyna, jest w ciąży.

Jeanie i Fischer zbliżają się do siebie i po raz pierwszy się całują. Ross leczy 17-latkę z mukowiscydozą, która chce umrzeć, ale jest zbyt młoda, żeby podpisać oświadczenie o braku zgody na resuscytację.

Hathaway jest zawieszona w obowiązkach, ale ma ręce pełne roboty, kiedy ona i dziesiątki klientów pewnego sklepu są przetrzymywani jako zakładnicy.

Hathaway wraca do pracy. Wcześniej wychodzi ze szpitala, żeby podejść do egzaminu na medycynę. Carter nie zgadza się z diagnozą dr Anspaugh i dowodzi swojej racji, co robi ogromne wrażenie na starszym koledze.

Jeanie zajmuje się ciężarną Carlą, która jest ofiarą wypadku i zaczyna rodzić na długo przed terminem. Jeanie dowiaduje się, że Benton jest ojcem.

Greene i Weaver rywalizują o posadę wykładowcy akademickiego. Carter podważa diagnozę dr Anspaugh i prosi Hicksa o przeprowadzenie trudnego zabiegu u pacjenta, którego leczenia nie chce się podjąć jego kolega.

Hathaway dowiaduje się, że bardzo dobrze poszły jej egzaminy na medycynę, ale uświadamia sobie, że kocha pielęgniarstwo, które jest jej powołaniem.

Greene zostaje brutalnie pobity przez nieznanych sprawców w łazience szpitala. Jeanie i Al wracają do siebie. Rossa przestaje zajmować seks, a zaczyna golf.

Pobity i posiniaczony Greene wraca do pracy. Carla rodzi dziecko dwa miesiące przed terminem i jest w stanie krytycznym. Carter zaczyna zastanawiać się, czy chce zostać chirurgiem, bo ma poczucie, że bardziej przydaje się na ostrym dyżurze.

Greene nie może zasnąć i zaczyna demolować hol szpitala. Nie chce przyjąć do wiadomości, że ma problem i kupuje broń. Niedługo potem celuje lufą w kierunku młodocianych przestępców, którzy próbują go okraść.

Weaver informuje Cartera, że musi powtórzyć rok stażu, bo odszedł z chirurgii i został rezydentem na oddziale ratunkowym. Hathaway i Ross w dalszym ciągu potajemnie się spotykają.

Greene nie może dojść do siebie po fizycznej napaści i stawia błędną diagnozę. Rodzina Kenny’ego Lawa oskarża Greena o błąd w sztuce medycznej.

Wypadek w miejscu pracy zmusza byłego męża Jeanie do przyznania się koledze, że jest nosicielem wirusa HIV. Morgenstern dochodzi do siebie po zawale i nie jest w stanie wrócić do pracy, a Anspaugh wyznacza Weaver na swoją tymczasową zastępczynię.

Kobieta uzależniona od cracku rodzi martwe dziecko i twierdzi, że nie wiedziała, że była w ciąży. Greene, który kilkakrotnie przyjmował ją w swoim gabinecie, nie zrobił jej testu, pomimo, że skarżyła się na bóle podbrzusza.

Hathaway zgłasza nowy pomysł - chce otworzyć nową rodzinną klinikę, która będzie zapewniać pacjentom szpitala kompleksową opiekę. Weaver wspiera jej pomysł.

Anspaugh próbuje przekonać Bentona, żeby dołączył do zespołu chirurgów dr „Rakiety" Romano, w której pracuje już Corday. Szpital chce zawrzeć ugodę z rodziną Kenny’ego Lawa. Greene całuje Cynthię, która wraca z nim do domu.

Greene jedzie z Rossem do Kalifornii, gdzie jego przyjaciel musi zidentyfikować ciało ojca i odebrać znalezione przy nim rzeczy. Śmierć ojca Rossa skłania Greene’a do odwiedzenia w San Diego rodziców, z którymi dawno się nie widział.

Jeanie dowiaduje się, że Weaver przyznała sobie dużą podwyżkę i oskarża ją o bezprawne zwolnienie z pracy z powodu nosicielstwa HIV. Były student Cartera musi powtarzać u niego rok.

Jeanie wraca do pracy, w czym pomaga jej grupa wspierająca gejów i lesbijki. Al sam przeprowadza się do Atlanty. Córka Greene’a poznaje Cynthię, ale kobieta za bardzo się stara zaprzyjaźnić się z dziewczynką.

Niewidomy mężczyzna jest przekonany, że został wyleczony przez dr Bentona i opowiada wszystkim, że lekarz czyni cuda. Niedługo potem na oddziale zjawiają się kolejni pacjenci, którzy wierzą, że Benton ma wyjątkową „moc”.

Corday wyprowadza dr Romano w równowagi, bo prosi lekarza z innego szpitala, żeby skonsultował jej pacjenta. Na oddział zostaje przyjęty syn dr Anspaugh z silnymi bólami brzucha. Jeannie udaje się go uspokoić.

Ross chce zaskoczyć Hathaway i organizuje w tajemnicy romantyczny ślub. Jego narzeczona o niczym nie wie i wyjeżdża z sanitariuszami na akcję ratunkową. W drodze powrotnej pociesza jednego z nich i go całuje, a potem czuje się winna.

Benton i Corday umawiają się na randkę i grają w rzutki. Carter musi podjąć trudną decyzję, by uratować życie seryjnego gwałciciela.

Greene wraca do San Diego, by zająć się matką, która spadła z drabiny i doznała urazu kolana. Cynthia impulsywnie jedzie za nim na Zachodnie Wybrzeże. W szpitalu wojskowym matka Greene’a zaczyna się dziwnie zachowywać.

Podczas wybuchu w magazynie środków chemicznych wiele osób zostaje rannych. Skażone ofiary zostają przewiezione na ostry dyżur, gdzie stanowią dla personelu zagrożenie.

Jeanie wspiera Scotta podczas jego pierwszej chemioterapii. Greene odnajduje Cynthię, z którą widzi się po raz pierwszy od czasu jego wyjazdu do San Diego. Postanawiają się pokojowo rozstać.

Bolesna biopsja szpiku kości potwierdza, że Scott ma nawrót choroby nowotworowej. Hathaway prosi pracowników, żeby poddali się testom, by potwierdzić, czy mogą być dawcami szpiku.

Dziwnie zachowanie Morgensterna nasila się i lekarz nie jest w stanie przeprowadzić operacji. Benton odsuwa go na bok i zaczyna zabieg, ale pacjent umiera mu na stole. Ross oświadcza, że chce zająć się pediatrią.

Na ostry dyżur zostają przewiezieni ranni w zamachu bombowym na centrum planowania rodziny. Carter opiekuje się starszym pacjentem, który jest przekonany, że padł ofiarą zaniedbania.

Benton i Corday w dalszym ciągu spotykają się w tajemnicy przed wszystkimi. Benton uczestniczy w chrzcie swojego syna. Na miejscu jest także nowy partner Carli, Roger. Romano zaprasza dr Corday na randkę, ale spotyka się z odmową.

Jeanie boi się, że zaczyna chorować, ale badania potwierdzają, że jest zdrowa. Chory na nerki teleewangelista chce transmitować na żywo swój zabieg na oddziale ratunkowym, żeby zorganizować zbiórkę pieniędzy.

Dr Corday jest niemile zaskoczona, kiedy dowiaduje się, że Romano nie chce przedłużyć ich współpracy. Greene i Weaver muszą wszcząć postępowanie dyscyplinarne wobec Rossa za nieetyczne potraktowanie Josha McLeana.

Studentka trzeciego roku medycyny Lucy Knight zaczyna pracę na ostrym dyżurze. Lekarze są pod wrażeniem jej wiedzy medycznej, ale uważają, że nie ma odpowiedniego podejścia do pacjenta.

Carter chce oszczędzać i żeby wprowadzić się do akademika rezydentów, zostaje ich doradcą. Benton odwiedza Corday w jej mieszkaniu, gdzie poznaje jej ojca.

Greene zgadza się objąć stanowisko ordynatora oddziału ratunkowego i zostać członkiem komitetu rekrutacyjnego, który obsadza wakaty. Ross zostaje szefem pediatrii na ostrym dyżurze.

Ranny członek gangu próbuje uciec z ostrego dyżuru, żeby dokonać odwetu. Benton pomaga Reese’owi ukrywać przed pozostałymi współpracownikami jego problemy ze słuchem. Jeanie chce zostać asystentką Rossa na ostrym dyżurze pediatrycznym.

Jennifer chce przeprowadzić się do St. Louis i zabrać ze sobą Rachel. Carter oświadcza Lucy, że jest odpowiedzialna za organizację przyjęcia halloweenowego w akademiku, a sam przygotowuje swoją prezentację.

Greene ryzykuje życiem, żeby uratować nastoletnią męską prostytutkę. Halloweenowa impreza wymyka się spod kontroli. Carter zostaje zdymisjonowany ze stanowiska doradcy rezydentów i musi znaleźć sobie nowe mieszkanie.

Hathaway jest rozżalona, że nie może zajść w ciążę i odbywa nieprzyjemną rozmowę z kobietą, która chce przerwać ciążę. Weaver z satysfakcją obserwuje dr Anspaugh, który próbuje zarządzać pracownikami kontraktowymi.

Carter i Lucy łączą siły, żeby uratować życie młodej dziewczyny, która wymaga natychmiastowej transfuzji krwi. Lucy i Carter szukają po całym mieście jej ojca, który jest idealnym dawcą, bo ma tą samą rzadką grupę krwi.

Szpital świętuje swoją 100. rocznicę powstania i nowa dyrektor Amanda Lee prosi Cartera, aby oprowadził po nim Ruth Johnson, kobietę, która urodziła się tam sto lat wcześniej.

W Wigilię Benton nie pozwala dr Romano operować pacjenta, bo jest pewien, że jego kolega jest nietrzeźwy. Jerry uważa, że Lee za bardzo interesuje się Greenem.

Dociekliwy Greene znajduje dowody na to, że Lee jest oszustką, a Anspaugh nigdy nie sprawdził jej referencji. Pracownik opieki społecznej sugeruje Bentonowi, że Reese potrzebuje „specjalnego” środowiska, co objawia się jego problematycznym zachowaniem.

Hathaway kłóci się z siostrą Evans, która otrzymała grant na zorganizowanie seminarium w klinice, czego z nią nie skonsultowała. Ross może podważyć wiarygodność wyników prowadzonego w szpitalu badania.

Corday nie zgadza się zeznawać przeciwko Romano, który groził Bentonowi, że doprowadzi do jego zwolnienia. Zmęczony Anspaugh przyjmuje propozycję Romano i zostaje zastępcą ordynatora.

Benton zapisuje się na kosztowne lekcje języka migowego. Romano proponuje Bentonowi zgłoszenie się do programu, w ramach którego będzie zastępował przebywających na urlopie lekarzy z prowincji w zamian za bardzo atrakcyjne wynagrodzenie.

Ratownicy medyczni ratują dzieci, które zostały ranne podczas wypadku szkolnego autokaru. Żona Mobalage’a ma wiele ran kłutych. Carter i Lucy przestają ze sobą sypiać, bo jest to niezgodne z regulaminem szpitala.

Benton jedzie do Missisipi, żeby dorobić sobie tam jako wizytujący lekarz w powiatowym szpitalu. Na miejscu okazuje się, że nie jest to szpital, ale wiejska przychodnia prowadzona przez pielęgniarkę i zakonnicę Maureen.

Carter wyjeżdża z ratownikami karetką do wypadku. W drodze powrotnej mija okolicę, w której doszło do zamieszek i niechcący potrąca nastolatka. Reggie i dr Baker szukają Jeanie.

Weaver odwiedza kobietę, która może być jej biologiczną matką. Po spotkaniu lekarka uświadamia sobie, że jest to niemożliwe. Hathaway umawia się z położnikiem, żeby porozmawiać z nim o ciąży.

Romano zmusza Bentona, żeby wybrał jedno z dwóch bardzo różnych stypendiów. Greene i Corday zaprzyjaźniają się w drodze na konferencję medyczną.

Po gwałtownej burzy w mieście nie ma prądu, a w szpitalu dochodzi do awarii generatora. Pracownicy szpitala robią wszystko, aby utrzymać przy życiu swoich pacjentów.

Hathaway informuje Rossa, że jest w ciąży i jest rozczarowana, kiedy dowiaduje się, że ojciec jej dziecka nie zamierza wracać do Chicago.

Weaver ratuje porzuconego 2-latka, któremu ktoś podał silne leki. Romano proponuje Corday stypendium na oddziale kardiochirurgii, którym nie był zainteresowany Benton.

When Anspaugh decides to retire as chief of staff and return to surgery, he appoints Romano as his replacement. Greene expresses reservations about the decision, but Weaver does not support Greene. Romano makes Weaver the new chief of emergency medicine.

After his mother's funeral, Dr. Greene comforts his father in San Diego. In Chicago, Romano surprises Corday by appointing her associate chief of surgery. Corday treats Elaine, Carter's lover, for breast cancer.

A recommendation from Weaver allows Jeanie to have temporary approval as a foster parent for baby Carlos. Reggie and Jeanie get married. Lucy and Kovac talk with a young woman whose husband they believe is very dangerous.

Hathaway befriends an out-of-work waitress, Meg. Seven-months pregnant, Meg cannot afford prenatal care. Hathaway invites her to the hospital, performs free tests and helps her interview for a job in the cafeteria.

A prank in a high school science class goes terribly awry, injuring a teacher and several students. Hathaway discovers Meg's drug addiction. Weaver and Greene notice Lawrence gets easily confused.

Benton struggles with the idea of taking a DNA test to determine whether or not Reese is actually his son. As the signs continue to pile up, Kerry and Mark use a fake patient to convince Dr. Lawrence of his Alzheimer's. Carter has trouble persuading a woman from a nursing home fire to sign a DNR for her husband and later is asked to forge charts for a family with no insurance. Carol continues to meddle in Meg's life, having her arrested so that she can be detoxed. Cleo is blamed for an explosion in the suture room but it may actually be Dr. Dave's fault.

Weaver tries to save the life of a rape victim while Corday struggles with feelings of disdain as she is forced to save the rapist. Cleo treats a teenage alcoholic boy whose alcoholic mother refuses to recognize her problem or his.

On Thanksgiving Day Carol goes into labor. She's able to get to the ER only thanks to Luka's help. She delivers the first baby in the ER, but the second causes some trouble. Greene leaves Elizabeth to deal with his father and daughter, as he rushes to assist Carol.

Kovac and Haleh take care of Hathaway's twins so the new mother can finally get some rest. The job transfer for Carla's husband does not get approved allowing Reese to stay in Chicago. Lucy endeavors to get a heart transplant for a young woman and goes to Romano's house begging him to perform the surgery.

In order to get her paitient to tell her the location of a missing body, Corday agrees to grant him a fatal wish. Kovac befriends two brothers. He tells Weaver that his wife and children died in the Bosnian war. Former medical student Deb Chen returns to County General as a resident, using her Chinese name, Jing-Mei Chen.

Lucy's patient finally gets a heart transplant but does not survive. The transplanted heart will now go to another recipient. Greene interferes in a gay domestic situation. Corday tricked her patient who murdered several women and now he's being transferred to a county jail.

Two boys brought in after a fight at school leads Cleo to discover that one of them has been injecting himself with hormones. Hathaway's obstetrics nurse, Abby Lockhart, joins the ER as a third year medical student on an ER rotation.

Dr. Greene and Corday bond with their parents, Lucy cares for a patient with a psychotic break, and Valentine's Day celebrations in the ER end tragically for one of the students.

Carter and Lucy are discovered and the staff struggles to save them and go on with normal patient care.

Kovac witnesses an accident and saves the young victim's life. Carter slowly recovers from his brutal attack and undergoes excruciating physical therapy. Hathaway helps two sexually active 14-year-old girls.

Even though he suffers from intense pain due to his stabbing injuries, Carter returns to work and prescribes a controversial procedure for a suicidal patient. Greene tries to convince his father to undergo cancer treatment.

Chen's patient refuses to reveal to his daughter that she might have inherited a terrible disease from him. Weaver defies Romano's authority and performs a procedure that gets her suspended. An available kidney causes friction between Corday and Kovac as they decide which one of their patients will get it.

After Corday refuses to perform exploratory surgery on Cleo's patient, Cleo enlists Benton's help, infuriating Corday. Abby cares for a pregnant woman with five children who wants an abortion. Greene lovingly tends to his dying father at home.

Carter seeks psychiatric help because he can't sleep. He then visits the wife of his attacker. Weaver returns to work after her suspension. Hathaway and Kovac share a kiss.

Weaver reprimands Carter for doing a dangerous procedure without consulting Kovac. She also talks to Hathaway about Hathaway's lack of focus on the job. And while treating a 6-year-old patient involved in a minor car accident, Malucci and Cleo discover the girl has been sexually molested recently by her father.

Greene prepares to bury his father. Chen worries about Carter's mood swings. After witnessing the interaction between a dying woman and her family, Hathaway realizes she wants her family together and flies to Seattle to join Ross.

As the result of a school shooting, Kovac and Benton care for the gunman and his victims. Abby discovers that Carter has been illegally injecting pain relievers. Greene and Weaver confront Carter about his problem, and Weaver orders him to enter a drug rehabilitation center or leave the hospital permanently.

Dr. Carter struggles with his drug dependency; a custodial strike leaves the ER cluttered with garbage; a riot at a high-school football game leaves several wounded.

A young couple cope with their baby being premature; Greene and Corday struggle with their relationship.

Dr. Carter is allowed a cautious restart with small steps. An extremely blond Dr. Malucci is very curious who's made Dr. Chen pregnant. Dr. Benton has been written out of all the hospital's systems and is stunned by Dr. Romano. An unfortunate incident at a Science Fiction convention makes it look like scenes from the movie 'Mars Attacks'.

Benton is unable to find a job after Romano negatively influences local hospitals. He reluctantly agrees to accept Romano's demeaning offer of a per diem job at County with no benefits. Kovac and Abby are attacked by a mugger with a steel pipe. Injured, Kovac protects Abby and smashes the robber's head on the ground repeatedly.

Greene flies in a helicopter to a remote area of Indiana to rescue a heart transplant patient. The helicopter develops problems, and Greene arranges for paramedics to transport the patient to County. Because Weaver is gone for the day, Romano appoints Benton in charge of the ER. Kovac is plagued by the death of the mugger.

Corday rushes through a surgical procedure in order to take off on a romantic weekend with Greene. She is later called back to the hospital after her patient suffers complications. Abby's mother, Maggie, who suffers from bipolar disorder (manic-depressive) and refuses to take her medication, unexpectedly visits Abby at the hospital and wreaks havoc on Abby's life.

Tests reveal that Greene has a brain tumor, but he hides the news from Corday. Corday finds out that she is being sued for malpractice. She also reveals to Greene that she is pregnant. Abby's mother refuses to leave. Abby expresses resentment over her difficult childhood to her mother but resignedly brings her home for Thanksgiving dinner.

Maggie's emotional instability worsens. She refuses her medication, becomes combative and flees the hospital. Abby finds solace with Kovac. The gang member girlfriend of Benton's deceased nephew knows who killed him and that he was hated for his antigang stance.

Chen gives birth, but insists on breastfeeding the infant before she gives it to the adoptive parents. Greene and Corday consult a brain specialist in New York City who believes the tumor can be safely removed. Stressed and tired, Carter impulsively swallows two painkiller pills but intentionally vomits them. He confesses to Abby.

Mark Green is in New York on New Years Eve for cancer surgery. Meanwhile a father and son are involved in a car crash.

Benton and Cleo clash over his deceased nephew's girlfriend. They finally agree to call a social worker. Benton confesses his love to Cleo. The spinal surgery malpractice suit is settled by employing a technicality: the equipment used was later recalled by the manufacturer. But Corday now doubts her abilities as a surgeon.

Greene returns to work but confuses words and displays uncharacteristic anger. Eager to get out of his per diem situation, Benton agrees to a full time position. Carter visits his cousin, who became paralyzed after a drug overdose. A workplace disaster results in numerous injuries and fatalities among illegal immigrants.

Weaver becomes concerned about Greene's cognitive skills and surreptitiously calls for an official evaluation of his competency. Corday plans her wedding to Greene. Bishop Stewart returns, and Kovacs realizes the man has a terrible disease. Dateless for a charity function, Carter invites Abby to attend with him.

As the new director of diversity, Benton studies medical school applications and discovers that his own academic record did not qualify him--he was admitted because of affirmative action. Weaver feels uncomfortable amongst Legaspi's lesbian friends. Carter treats an unvaccinated child who contracted measles.

In the series' 150th episode, a massive train wreck mobilizes the emergency room doctors. Corday, Carter and Kovac rush to the scene. Corday falls and injures her back, bringing on contractions in only her 25th week of pregnancy. While amputating the legs of a fallen firefighter, Corday stops because of her pain.

Weaver fears for her own reputation when Legaspi is accused of sexual harassment. Afraid to reveal her relationship with Legaspi--for both personal and professional reasons--Weaver fails to support her during the investigation. An infant is abducted from the hospital and later found on a train platform.

A demented patient causes a shootout in the emergency room. After terrorizing people in the ER with a gun, she gets shot by a policeman. She soon dies. Benton later discover her dementia was caused by an aftereffect of his surgery that he and Cleo should have detected. Carter pursues a cute intern.

Numerous mishaps threaten to mar Corday and Greene's wedding day. As the very pregnant Corday becomes increasingly agitated, the presence of her bickering divorced parents does little to improve her mood. With the intense rain, Greene has a difficult time making it to the church. But, evenutally, he arrives and they joyfully wed.

Abby and Carter travel to Oklahoma to rescue Abby's mentally ill mother and bring her back to Chicago. In Chicago, Maggie suffers from a sleeping pills overdose. At County General, Kovac frantically revives her. Benton treats a college student injured in a fraternity prank.

Maggie contests Abby's attempt to institutionalize her. Weaver treats a few bizarre patients. When Legaspi returns to work after being exonerated of sexual harassment, Weaver tries to reconcile with her. Benton injures his hand while transporting his former teacher to the hospital and must contend with the teacher's wisecracking elderly buddies.

Cleo and Carla clash after Reese gets hurt while in Cleo's care. Weaver and Kovac cannot save the life of a developmentally challenged woman's only caregiver. Abby goes to a therapy session with Maggie. Later, Abby confesses to Maggie that she is afraid to bear children because they might be bipolar like her mother.

The ER is flooded with foster care home residents, attacked by a shooter bent on tracking down his son, who , with the help of Dr. Green, was put into the foster care system amid allegations he was being abused by his father.

Weaver returns to the emergency room after a self-imposed sabbatical of three weeks, wondering how her newfound lesbian identity will affect her workplace relationships. Having purposely allowed a mass murderer to die, Greene must keep the secret amidst the scrutiny of his superiors.

Carter is overwhelmed by patients from a rock concert riot. Benton's former girlfriend is killed in a car accident. Newly promoted to chief resident, Chen panics and misdiagnoses a patient. Kovac angers Abby by flirting with a waitress.

Greene's daughter comes to live with him and Corday. Carter and Abby become more intimate. Chen must prove her skills while saving a baby. Weaver terminates Malucci after witnessing him having sex in an ambulance.

Dr. Susan Lewis arrives, looking for work in the Chicago area again. Greene hires her, over Weaver's objection. Chen nervously attends a risk management review, accompanied by the unforgiving Weaver, to discuss a patient who recently died under Chen's supervision.

Lewis faces a hectic first day back at County General. Benton and Roger become frantic when they can't locate Reese. Carter's grandmother is brought to the emergency room. Carter and Abby deal with inept medical students.

Corday's ordeal, caused by the recent infection-related deaths of several of her patients, worsens when she is closely observed by a stern taskmaster. Corday is outraged when a county investigator accuses her of deliberately euthanizing the patients, who all happened to be elderly.

A new medical student, Michael Gallant, arrives in the ER. He's supposed to be working under Dr. Carter's supervision but his grandmother is unwell. Elizabeth Corday is convinced that other doctors are refusing to work with as a result of the mysterious deaths.

When a torrential rainstorm pounds Chicago, patients deluge the emergency room while Weaver speeds to an accident site. There, she finds a pregnant woman, Vicki lying injured inside a wrecked ambulance while live power lines spark. Fourth-year student Michael Gallant makes a dangerous decision in order to help.

Peter Benton continues his court fight against Reese's stepfather, Roger, who seems to have the upper hand. When a woman is accidentally shot during a gas station robbery, Dr. Corday tries to convince the husband to let them harvest her organs. A 15 year old boxer is brought in with a head trauma after sparring with his older brother. Newlyweds are having trouble when she constantly breaks out in a rash; Carter thinks he knows the cause.

Benton commits perjury on the witness stand in order to gain custody of Reese. When Romano refuses to give him a more even schedule, Peter resigns and seeks a job at the clinic where Cleo is newly employed. Benton is granted custody of Reese and he and Cleo decide to move to the suburbs together. Meanwhile, Carter's father visits for Christmas with the news that he's getting divorced, Weaver and Sandy Lopez finally go on a date, and Abby catches Nicole in the maternity ward, recovering from an abortion.

Abby helps a distraught boy whose mother died of a stroke; a man with schizophrenia, who once stabbed Carter and killed a doctor checks into the ER.

An injured and condemned murderer wants to die in the ER rather than await execution; Abby advises a neighbor to seek shelter from her abusive husband.

An accidental overdose brings Drs. Green and Corday's baby into the ER.

Greene confronts Corday when she orders Rachel out of their home; Abby tries to protect a battered neighbor who refuses to press charges against her husband.

After Dr. Corday moves out, Dr. Green fights loneliness and pain by immersing himself into his work. Dr. Chen discovers that a comatose teen is ready to give birth.

After some staff members are caught going through a dominatrix's bag, Weaver makes them attend a sexual harassment seminar, where they learn about each other.

Drs. Corday and Greene are awkward when working together in the ER. Dr. Weaver treats victims of an intense fire that may take the life of a dear friend.

As Dr. Greene's brain tumor begins affecting his coordination, he becomes concerned that his fate will be similar to the terminally ill patients he treats.

When Dr. Lewis gets a hysterical call from her niece, Susie, she hurries to New York to search for the child and her sister Chloe.

The crossover continues on Third Watch S03E19 Unleashed

Dr. Carter reads a letter from terminally ill Dr. Green to the ER staff. Dr. Weaver lashes out at a mentally challenged patient. A terminal, homeless man continues asking for Dr. Green.

Dr. Greene's final days are spent in Hawaii with Rachel, teaching her to drive and surf. When he suffers a seizure, Elizabeth is called. Mark refuses to go home. He manages to make amends with his daughter before his eventual death.

Just when the ER is understaffed and swamped, two children who were brought in turn out to have full blown smallpox. The entire ER must be locked down. The staff needs to improvise while they battle not only the disease but also frayed tempers.

Dr. Carter, Abby and other staff of the ER are quarantined as the CDC investigate a mysterious, deadly outbreak.

After another hospital shuts down, the ER is flooded with patients. Dr. Pratt resuscitates a heart-attack victim who had been pronounced dead.

Dr. Carter leads a walk-out of staff protesting lack of security in the ER.

Weaver makes a mistake on live television while demonstrating flu shots, inadvertently sticking two reporters with the same needle. In the bathroom later, Susan and Abby catch Weaver in a stall with a needle. Weaver confesses to Susan that she's taking hormones. Carter, assuming Susan knows already, tells her about Abby's drinking problem. Abby becomes nurse manager, and argues with Carter about her drinking. Luka flirts with a patient's mom and is caught emerging from a storage closet with her. Gallant has a rough day: Pratt butts in on a patient of his, and Stella Willis dies because Kayson didn't bother with thorough treatment.

On a busy Halloween night, Carter and Abby are the only staffers in costume when victims of an apartment building fire pack the ER. Corday takes on a new med student for a surgical rotation - Paul Nathan, who suffers from Parkinson's disease and decided to pursue medicine after being diagnosed. Despite a difficult first day, both professionally and medically, Nathan makes a difficult diagnosis. Romano's rehab lags behind his expectations, and he begins to doubt his role in surgery is no longer an option. In a moment of personal weakness, he tries to express his ...

Corday clashes with new surgical resident Paul Nathan regarding his intervention into the treatment of a sickly young woman, Alison, who has signed a "do not resuscitate" order. Abby wonders about the erratic behavior of her visiting brother Eric, and feels conflicted over a nurse's official complaint against Kovac, Abby's former lover. Meanwhile, Pratt comforts Chen after a patient threatens her, and Corday suspects that an unconscious, 14-year-old female patient has been sexually assaulted.

Abby fears the worst when her brother Eric suddenly disappears. Carter and Chen treat a frightened Chinese immigrant nanny, Tong-Yi, whom they suspect was impregnated by her employer. Meanwhile, new surgical resident Paul Nathan, who is struggling to overcome a physical disability, tries to help in the emergency room—but his fellow doctors do not appreciate his advice to patients. Unable to quench his sexual appetites, Kovac also gets into trouble in his professional life, despite his admirable resolve to find an eye specialist to treat a young gunshot victim. Gallant and fellow medical student Erin Harkins engage in an escalating competition of medical knowledge. And Weaver gets some much-needed good news.

Abby's family nightmare continues as she and her mother Maggie search for Abby's missing brother Eric, who Abby suspects is suffering from serious mental problems. Meanwhile, Corday treats a family of patients who, while building a snowman, were severely injured after being struck by a truck driver.

Abby is distressed when her mother interferes with Eric's treatment at a psychiatric hospital. Pratt treats a frightened young girl who has been injured in an auto accident and desperately wants to hide a secret. An unhappy Luka forms an unlikely bond with a lonely elderly woman who makes him a surprising offer. Chen is overcome with upsetting memories when a baby is abandoned in the emergency room. Pratt takes action after Leon is fired from his menial job.

Dr. Kovac's speeding causes a crash on an icy road. The ER staff treats angry elves and a female hockey player with a head injury.

Dr. Pratt brings a gun into the ER; Dr. Weaver tries to conceal her pregnancy; a woman plots against her dying husband; Dr. Chen treats math students who overdosed on an unknown stimulant.

Dr. Weaver is in a difficult situation when an alderman tests positive for syphilis. Dr. Carter is impressed when he meets a man who runs an inner city clinic.

Dr. Pratt's disabled roommate leads him to a wounded thief. Dr Carter decides to practice medicine in Africa. A doctor makes a pass at Dr. Corday.

Abby's troubled brother is missing. A car runs into a crowd of teen girls. The alderman with syphilis gives Dr. Weaver a promotion. Dr. Lewis looks forward to a blind date.

Abby comes close to breaking down trying to deal with her mother. Dr. Pratt goes for his required paramedic ride-along. Dr. Weaver confronts the man who stole her purse. Dr. Lewis has a teen admirer.

The police question Drs. Pratt and Gallant about a rampage at the diner across from the ER. Dr. Lewis befriends her teen admirer, a cancer patient.

Dr. Weaver bends the rules and treats the Alderman's lover for syphilis. Dr. Kovac's patient claims she was sexually abused at a boot camp for troubled youth. Dr. Carter treats a women with a nasty personality.

Dr. Romano seizes control of the ER and manages to offend everyone. Dr. Kovac asks Dr. Corday's help in the quest to bring a sickly Croatian boy to the U.S. for medical treatment.

A psychotic patient threatens Abby. Dr. Weaver suspects a woman poisoned her own baby. Dr. Romano continues to make rash judgments.

Dr. Carter tries to prevent a grieving gang member from going after vengeance. Dr. Kovac races against time to save a Croatian boy's life. A baseball player gets treatment for a heart problem.

Carter's day shift and Pratt's night shift (his final shift at County) are intercut. Both men have extremely busy days. Doc Magoo's burns down. Luka calls Carter from the Congo and asks for help. Carter decides to go. Pratt decides to stay at County. In other parts of the hospital, Romano has his now-useless left arm amputated.

Carter travels to the Congo after Luka calls and asks for help. During the course of his two weeks there, he learns how much different the conditions are against what he's used to. Luka decides to stay for a while as Carter heads back to Chicago, ending up at a sleeping Abby's bedside.

Carter returns from Africa, going straight to Abby's bedside. Her response to seeing him is to ask for her key back. She is very chilly towards him all day until new med student Neela Rasgotra answers a phone call for Carter. The message: Luka is dead. Carter decides to go back to the Congo to bring the body back. Neela has a tough first day in the ER, earning Chen's ire after Pratt flirts with her. Gallant, now a full-fledged doctor, helps to show her the ropes.

John Carter returns to the Congo to retrieve Luka Kovac's body. He finds however that the area where was killed is still too dangerous to enter. He and Gillian finally manage to hitch a ride with a Red Cross worker, Debbie, who is going to the area. In flashbacks, we learn how Kovac and his fellow aid workers were taken prisoner by rebel troops. They are shot, one at a time, until only Luka is left. Amid the destruction of the eastern Congo, we learn his fate. Carter also makes a fateful decision.

Luka Kovac arrives safely at County General and is hospitalized for treatment. His friend Gillian delivers John Carter's letter to Abby.

Confident second-year resident Pratt wants to prove his abilities when he works the graveyard shift (11 p.m. to 7 a.m.), but his heroics sometimes backfire. Pratt shows contempt for a man, Ed Gamble, who presents no symptoms of disease but temporarily loses his speech.

Ben Hollander is a distraught architect whose degenerating eyesight causes him despondent while a spirited new nurse, Samantha Taggart joins the staff. Elsewhere, disaster strikes when the doctors suspect a mother is abusing her child while Dr. Corday learns something shocking about the charismatic Dr. Dorset, and Dr. Archie Morris is overwhelmed by the chaos and grisly conditions of life in the E.R.

Pratt and Kovac clash over a miscarriage-prone young woman, Denny, who arrives to deliver a premature baby. Pratt wants to make heroic efforts to save the unborn child, while Kovac is adamantly against spending vast amounts of money to keep the forever sickly baby alive.

To everyone's amazement, Lewis makes a date to share a home-cooked dinner with the elderly Ben Hollander, her depressed patient who is going blind.

On Thanksgiving Day, a helicopter crash outside the ER leaves several injured, and kills Dr. Romano. Alex tries to bring Sam and Luka together.

Neela helps treat two Amish teens who were in a car crash. Sam argues with Dr. Kovac when he pays too much attention to her son.

Dr. Carter celebrates Christmas at a clinic in the Congo dealing with low supplies and anti-Americanism, but in the meantime, falling for an AIDS worker named Makemba.

Carter returns to County General to hearty welcomes. Although Abby is shocked to learn that Carter's beautiful African girlfriend, Kem, is already pregnant with Carter's child, Abby has moved on with her life as well, going back to medical school.

Abby and Neela are assigned to a month-long rotation in the neonatal intensive care unit where they experience emotional roller coasters while caring for the sick infants.

Dr. Carter's girlfriend makes an impression as she observes ER operations. Dr. Gallant is almost shot during a domestic incident. Dr. Weaver dedicates a center to the memory of Dr. Romano.

Sam treats an abused, pregnant teen. Dr. Carter introduces African girlfriend Makemba to wintertime. ER chaos shocks a risk-assessment expert. Dr. Pratt and Abby restrain a man who has tuberculosis.

Carter misses his pregnant girlfriend who has returned to Africa. A family of four is rushed to the emergency room after suffering carbon monoxide poisoning from their faulty furnace--forcing the claustrophobic Neela to accompany a newborn baby into an extremely uncomfortable hyperbaric chamber.

Morris streets a patient without getting a psych consult, and the guy steals a tank and heads for County. Gillian is visiting Luka, and Sam's not happy about it. Luka and Sam make up by the end of the day though. A 13-year-old boy has chlamydia. Frank has a heart attack. Corday plays the dating game, going out with two men.

Carter sticks up for Neela when the other attendings doubt her future in the ER. Neela caves to the pressure and accidentally gives a patient the wrong medication. Gallant takes the blame for her though. Sam and Luka try to plan Alex's birthday party. Frank visits on his way to therapy. Chen's home nurse quits after her dad behaves poorly.

Weaver rushes to the aid of her female life partner, Sandy Lopez, when the firefighter is severely injured while working and must now battle for her life. Frightened Weaver whispers hope to Sandy by reminding the victim of their newborn child.

Pratt struggles to diagnose a woman who suffers mysterious chronic seizures. An attractive woman, Campbell, informally accuses flirtatious Pratt of sexual harassment. Abby ponders how to get her contentious patients' attention during her psychiatric department rotation.

A panic-stricken Weaver is ordered to give her son to the Lopez family. Carter greets the returning Kem, but their meeting with his father, Jack, gets tense after Carter announces plans for his grandmother's estate.

Carter takes Kem to the hospital to check on their baby since it's not kicking anymore.

Kovacs stops to help a woman and her son whose car broke down. Steve is getting close to Alex, and Sam panics. Abby is looking for her letter whether to see she passed her boards. Pratt shows off his new Chrysler. Elgin tries to build a connection between him and Pratt. Jing-Mei might be battered by her senile father.

Sam and Luka go on the search for her runaway son, Alex. Meanwhile, Pratt and Lewis guide Abby, Neela and Ray, who have become R2's, on how to teach the new interns.

Much to Ray's dislike, a surrogate mother in labor doesn't want to have a C-section and endangers the life of the baby. Meanwhile, Sam tells Luka she and Alex are moving out. Pratt meets his half-brother and -sister, and Abby makes a difficult decision about a young boy.

Luka has a very bad day: New nurse manager Eve Peyton notices he doesn't want to work with Sam and tells him so. At the end of the day he's drunk and Abby takes him home.

The rainy night brings in diverse patients including a mother involved in a car accident with her baby, a man with a satisfaction facilitator, and a comatose patient who suddenly wakes up. Also, Sam steps up to Eve and her strict ways and Jerry gets struck by lightening!

A new attending, Dr. Victor Clemente, comes aboard and quickly makes a stir on the ER. Abby's breast cancer patient convinces her to take a long awaited test. Luka befriends a young woman who awakes from a six-year coma. Also, Weaver shows Clemente who runs the ER.

Pratt's half-brother tries to get him to make ends meet with his estranged father. Clemente treats an infant chimpanzee and involves Abby and Neela on the secret case. Eve promotes Sam and her first tasks is to fire a beloved nurse.

A kidnaped girl is the victim of police shooting. Abby is stuck in the middle of a disagreement between Luka and Clemente. Neela receives a phone call from Iraq. Later, Luka and Abby share a kiss.

The ER prepares to take in victims from a plane collision, while Neela and Pratt head out to the crash site where Neela makes heroic efforts. At the end of the day, Neela gets a surprising visit.

Gallant impulsively asks Neela to marry her that exact day, she says I do but soon gets cold feet. Morris stands up to Weaver on a patients course of treatment. Luka, Sam and Clemente treat a boy who contracted HIV from his mother. Also, Abby and Luka redefine their relationship and Luka is named the new Chief of Emergency Medicine.

Pratt and Weaver try to create a Christmas miracle when they work to save a girl wounded from gunfire. Eve gets into trouble after punching a disruptive patient. Also, Abby has a special gift for Luka.

Neela treats a religious teenage girl who turns out to be pregnant. Abby and Kovac struggle to figure out what to do with her unexpected pregnancy.

Ray helps an old friend escape from her abusive father. Dubenko volunteers in the ER but can't seem to handle a slow day. Abby and Kovac go baby shopping, while Neela gets unexpected and upsetting news from Gallant.

Dr. Nate Lennox, a former professor with ALS, is brought in as the progression of his disease is chronicled through his own flashbacks as he is treated by each of the doctors at one point. As Lennox wants to give up, Abby fights to convince him to keep on fighting.

An unexpected visitor puts Clemente in the middle of a domestic dispute. Meanwhile, Luka and Abby await test results on their unborn child; Neela struggles with her surgical elective and Pratt ends up with an unexpected suitor when he participates in a charity bachelor auction.

In the Sudan, Carter and a colleague struggle to save a woman who was raped by a band of militants. Back in the ER, Clemente asks to return to work after the shooting incident, but Kovac refuses. Meanwhile, Neela and Pratt have a work dispute, and, in a related incident, K.J.'s father shows up again in the ER.

When is it time to go out on a limb? Armand Assante guest stars as a patient who makes Sam an offer she might not be able to refuse. Luka must calm Abby’s baby-related fears after an incident at the hospital places everyone at risk. Kerry makes a difficult choice, and Neela joins a support group.

Abby and Luka desperately try to keep a young woman brought into the ER with stab wounds to the neck alive. As her condition begins to worsen, Clemente steps in and tries a risky procedure on the girl in order to save her life. Meanwhile, Neela pulls an all-nighter in preparation for a speech at a surgeon's convention, Ray treats a man claiming to have swallowed a bottle of pills, and Sam decides to take a part-time job with Richard to help her with childcare expenses.

When Luka answers a call for help, he discovers not everyone is pleased. Will he honor his commitment, or ask a colleague to step in for him? Abby and Morris wrestle with the strange case of a car crash victim. Having made a change in her life, Sam finds herself enjoying a few new perks. Neela has unexpected visitors, with even more unexpected news.

Pratt departs for Africa with attitude to spare but makes his first contact with harsh reality before the plane lands. Abby senses something is not what is seems when she treats a 12-year-old and her grandmother, then differs with Luka over the best course of action. A prisoner is brought to the ER with what everyone thinks is a fake case of appendicitis. Morris is dressed, and ready, to impress, but Albright’s not. It’s time for Kerry to return to work and Clemente doesn’t know when it’s time to leave.

Pratt gets to work in Darfur alongside Carter and his co-workers, but is troubled by astounding number of people needing care and finds himself making a dangerous journey.

Pratt struggles to get a straight story when two abused boys come into the ER with their father. Two U.S. Army officers enter the ER.

Chaos reigns in the ER when two prisoners are brought in for treatment, but instead plot a violent escape. Their desperate actions place one doctor in harm's way, and forces one nurse to become a tool in their plan.