When the E.D. is flooded with patients from a crash, the entire team is pulled in to help. Charles can't shake the feeling that he knows the new E.D. attending. Archer has second thoughts on the eve of his kidney transplant.

A woman from Archer's past returns and threatens his transplant surgery. Marcel clashes with Med's new eager first-year resident. Charles works to repair his relationship with Ripley.

Goodwin is worried after an accident lands two people close to her in the E.D. Archer returns to Med and treats a man concerned about a family curse. Maggie and Ahmad help a patient on a cross-country road trip.

Goodwin recruits Charles to evaluate her ex-husband's memory. Archer treats one of Sean's peers from the rehab center. Asher treats a woman from a rural clinic whose miscarriage was improperly treated.

Maggie empathizes with a patient whose mother is afraid to consent to her son's risky surgery. Ripley treats someone from his past. Ahmad questions her instincts.

Ripley and Charles treat a patient with OCD. Asher and Archer encounter a woman with a foreign object lodged in her heart. Marcel clashes with the chief of oncology.

Archer, Asher and Charles encounter an expecting father who claims he's telepathic and receiving messages from his yet-to-be born son. Ahmad works to thaw out a frozen criminal.

Ripley and Charles treat members of a cult. Ahmad's suspension takes an unexpected toll on Marcel. Abrams' 5-month-old son lands in the E.D. under questionable circumstances.

Maggie's budding romance takes flight. After a woman's shocking suicide attempt, Charles searches for answers. Asher works to diagnose a patient who is new to the city and appears with mysterious symptoms.

Ripley struggles to keep Sully's diagnosis a secret when the latter's pregnant girlfriend comes to Med for help. Johnson works to earn a spot in Med's trauma fellowship. Charles and a medical student treat a bipolar artist.

An infection threatens Marcel's risky liver transplant. Maggie and Charles help a struggling burn unit nurse. Goodwin is forced to make a tough decision about Bert's future.

Ripley and Charles treat a high-risk prisoner who may have dementia. Archer and Sean clash when a resident from Margo's facility lands in the E.D. Crockett receives shocking news.