On September 10, 2001, Sully and Ty party in Atlantic City on the eve of Sully's wedding to Tatiana; Faith makes plans to see her doctor for her biopsy results; Jimmy can't get enough rest after nursing a sick Joey the night before; Kim isolates herself and sinks deeper into depression, and Bosco goes looking for love in all the wrong places.

It's September 21, 2001 and the squads continue to battle through their emotions and their misgivings about their hero status, while working double shifts and spending every free moment at ""the pile"" searching for the missing; Kim returns to work and teams up with Doc, which allows an emotionally frayed Alex to return to paramedic duty; an exhausted Sully attempts to co-exist with his prospective in-laws while he waits for an opportunity to marry Tatiana.

After a despondent woman takes a walk off of an eight-story apartment building, the squad finds themselves in a race to transport both the woman's heart and a dying girl to a local hospital in time to save the youngster's life. The suicide hits home for Faith as she comes to grips with her own ongoing medical problems, while Doc expresses concern over the emotional effects this case will have on Kim, despite her constant reassurance that her accident was not an attempt to kill herself.

Even though his co-workers want to nominate him for the ""Paramedic of the Year"" award, a pensive Doc is disheartened as he considers his unfulfilled life. He later teams with Kim as they try to save a heart attack victim while fending off a woman who's wielding a meat cleaver. In addition, Doc tries to minister to a chronic old drunk and a teenaged girl who attempts suicide in her bathtub. Meanwhile, Faith secretly undergoes a procedure to determine if the lump in her breast is cancerous, leaving an unsuspecting Bosco assigned to a nervous rookie cop; Kim reluctantly consults a lawyer about Jimmy's intention to claim custody of Joey.

Bosco runs from the present and his past when he is wrongly suspected of murdering a sexual-assault suspect. As Faith tries to gather evidence to clear him, Bosco turns to his dysfunctional family, including his alcoholic mother, drug-addicted brother and estranged, abusive father. An emotionally rattled Kim virtually kidnaps Joey from Jimmy while Carlos actively solicits Ty to be his new roommate.

Jimmy and Kim, still locked in a custody battle over Joey, meet with a court-appointed evaluator and plead their cases in a heated exchange.

When Sully and Tatiana visit his mother at her nursing home, Tatiana expresses concern over the quality and cost of his mother's care. Convinced that she can do a better job of taking care of her at home, she signs her out and moves her in with them. Sully is shocked and displeased, and tells Tatiana that it will be too difficult for her to take care of his mother.

Alex tries to stay busy to avoid dealing with her feelings about her father's death. Eager to fill empty hours and maintain the brave front her father insisted upon when she was growing up, she works extra shifts and even helps Carlos and Ty move into their new apartment. While Carlos is downstairs unloading the truck, Alex takes Ty up on his previous offer to talk and asks him about his father, who also died in the line of duty.

Alex wants Ty to keep their relationship quiet. When Carlos almost walks in on them, he's so shocked and happy that Ty is straight that he doesn't realize that the girl is Alex. Carlos lets Ty know that Jason Christopher is the one who told him that Ty was gay.

Faith finishes her radiation treatments and is in pretty bad shape. but doesn't take Dr. Case's advice to take some time off. When everyone notices how sick she looks at the beginning of the tour, she lies and tells them that she caught a bug from her kids.

Later, Sully and Ty are called to rescue a family that has been shot and left for dead in the river. When they arrive at the scene, the father, Jared McKinley, tells them that they were abducted, robbed, driven to the river and shot. Hoping to locate some witnesses, Sully and Ty run a check on the license plates of the cars parked along the river and find that one of the cars was registered to McKinley, which makes him their prime suspect in the shootings.

Faith returns to work from a few days off. She apologizes to Bosco for hiding her illness and promises to never shut him out again.

Filled with guilt, Doc begins to second-guess himself on every call. Kim reminds him that Ryan would have choked to death had Doc not removed Ryan's collar and intubated him. She also tells him repeatedly that everyone makes mistakes, but her words don't seem to have any effect. He begins to visit Ryan daily, clinging to the slim hope that the paralysis may only be temporary, resulting from bruising to the spinal cord. Doc's prayers are answered one evening when Ryan is able to move his fingers.

Kim and Doc treat a junkie whose boyfriend maintains that she was injured in a fall. When it becomes apparent to them that her injuries were caused by a beating, the boyfriend flees the scene. Soon after they arrive at the hospital, she dies, and the hunt is on for her killer.

Doc visits Ryan, who's now walking during his physical therapy sessions.

Carlos decides to take a ride on the fire pole and falls, losing consciousness. Doc, Kim and Alex bring him to the ER where he is finally awake and combative. Dr. Thomas admits him to the hospital for observation because of his head lac and LOC. The nursing staff settles a score with Carlos by putting him in a room with Rodger, a drunk he brought in the day before. Rodger is alternating between screaming, crying, whimpering and non-stop talking -- all at the top of his lungs. He's going through the DTs and can't be sedated, because he admits to being drunk since 1987.

Doc visits Ryan, who's now walking during his physical therapy sessions.

Carlos decides to take a ride on the fire pole and falls, losing consciousness. Doc, Kim and Alex bring him to the ER where he is finally awake and combative. Dr. Thomas admits him to the hospital for observation because of his head lac and LOC. The nursing staff settles a score with Carlos by putting him in a room with Rodger, a drunk he brought in the day before. Rodger is alternating between screaming, crying, whimpering and non-stop talking -- all at the top of his lungs. He's going through the DTs and can't be sedated, because he admits to being drunk since 1987.

Feeling betrayed, Doc angrily confronts Jerry Mankowitz for tricking him into confiding vital information about a pending malpractice suit by not revealing that his old partner is now working as an attorney's investigator. Later, when Doc heroically responds to an emergency involving a near-comatose elderly woman trapped in ice, he remembers that his job is worth the legal fight ahead. Meanwhile, Carlos worries that he got the wrong telephone number from his latest romantic conquest. Faith thinks that troubled Bosco has lost his enthusiasm for police work. Jimmy struggles to act as both mother and father to Joey.

Feeling betrayed, Doc angrily confronts Jerry Mankowitz for tricking him into confiding vital information about a pending malpractice suit by not revealing that his old partner is now working as an attorney's investigator. Later, when Doc heroically responds to an emergency involving a near-comatose elderly woman trapped in ice, he remembers that his job is worth the legal fight ahead. Meanwhile, Carlos worries that he got the wrong telephone number from his latest romantic conquest. Faith thinks that troubled Bosco has lost his enthusiasm for police work. Jimmy struggles to act as both mother and father to Joey.

The police officers sort through the carnage and count their dead in the wake of a shootout between rival gangs. While Faith tries to interrogate Fyodor Chevchenko, a ruthless Russian mobster, Sully worries about the severely wounded Ty and regrets causing the incident. Tatiana chastises Sully for hassling her injured son. Faith worries about Gusler, her ineffective, frightened rookie partner, and a weary Doc gets some unexpected good news about his medical malpractice suit.

Tatiana panics and leaves Sully's apartment. There is a question about who killed Ross. Faith gets a few days off after killing someone.

During the investigation of the gang shootout, the officers are questioned and presented with evidence which suggests that Ross was killed by friendly fire; Carlos learns that Vangie is dead and that he might be the father of the baby her sister leaves at the firehouse; on the first anniversary of Bobby's death, Kim quarrels with Jimmy over her visitation with Joey and confronts a female gang during a call; and Doc is visited by the father of a former patient whose debilitating injury may have been caused by Doc's error during treatment.

Bosco's emotional turmoil escalates when he begins to experience panic attacks and flashbacks, but continues to deny that there's anything wrong. After he has a panic attack while driving the patrol car and nearly causes a crash, Sully insists that Bosco see his friend Brian O'Malley, who's a therapist and a former cop.

Hopelessly in love with Kylie and concerned that she will lose her Latina heritage if she is adopted by a white couple, Carlos considers raising her until he realizes that the couple can give her the sister, the grandparents, and the extended family that he cannot; Kim's preoccupation with her new PDA drives Alex crazy until they are able to use it to save a very sick man, thus redeeming themselves in the eyes of a hypercritical Dr. Peterson; Faith and Fred are still on uneven ground about the sergeant's exam; in an effort to shake Chevchenko's tree, Faith and Sully execute a clever plan to disrupt the Russian's bookmaking operation, which also opens the door to the possibility of the still-missing Tatiana's return; Bosco is cleared for duty, and he and Faith agree to be partners again as soon as he returns.

When a doctor comes to New York to search for the missing daughter of her drug-addicted sister, Faith and Bosco focus their attention on the child's stepfather, a New Jersey cop, after they discover that the girl was taken by a man in uniform; Tatiana returns home; Jimmy spends some quality time with Joey.

The crossover starts on ER S08E19 Brothers and Sisters

Rescuers find the body of Alex's father, and he is given a hero's burial; Faith and Bosco tail a convicted rapist released on appeal, certain that he will rape again; dissatisfied by Tatiana's explanation of her whereabouts the eight weeks she was missing, Sully investigates further and uncovers some astonishing and heartbreaking facts about his wife; after Chevchenko threatens to kill him if he doesn't roll over on Faith and Sully, Frankie tells Swersky that the raid on Chevchenko's numbers business was a hummer bust, leading Chevchenko to threaten a lawsuit and have another angry confrontation with Sully.

When a blackout strikes the city during a heat wave, Sully prophetically warns the more optimistic Ty that trouble in the streets will swiftly ensue. After Carlos leaves the ambulance running to keep the bus cool while he and Doc are on calls, the engine catches fire and the ambulance is destroyed. A wealthy old man confined to his bed by illness offers them a large amount of money to stay with him until his daughter arrives. Doc insists that they leave to treat others more in need over the protests of Carlos. Bosco arrests a young man, Latrell Griffith, and faces a difficult decision when an immigrant shop owner shoots and wounds a teenage shoplifter. After Latrell uses his training as a medic to save the boy, a riot breaks out and Bosco, Latrell and the shoplifter barely escape. Nightfall brings more unrest as the nervous cops try to keep the peace. Faith and Fred are stuck in a elevator when the power goes out. Faith tries to calm Fred's mounting anxiety about being trapped, and is