A grisly murder investigation leads Castle and Beckett to a suspect who claims he’s traveled back in time to stop terrible events from unfolding, events that will change the course…

Halloween night finds the ER awash with allergic or otherwise incapacitated children. Kerry tolerates a visiting candidate for chief while she waits for the official vote. Romano operates on an…

Mark goes to a trauma scene with the EMTs, where he treats a gunshot victim who has a bomb strapped to himself. Later, Mark’s daughter persuades him to treat a…

Dr. Corday’s father visits from overseas in an attempt to convince her to join his medical practice. Weaver suggests that Elizabeth look into alternative methods to stay in America, like…

Third-year med student Lucy Knight reports to the ER for the first day of her rotation. Greene takes a teacherly interest in her, helping her get acquainted, but she gets…

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…

After his mother’s funeral, Dr. Greene comforts his father (JOHN CULLUM) in San Diego. In Chicago, Romano surprises Corday by appointing her associate chief of surgery. Corday treats Elaine, Carter’s…

Mark tries to find a way to tell Rachel about his impending divorce. Benton attends a banquet at Vucelich’s home, with Jeanie as his date. Carter finally tells Mr. Rubadoux…

Carol and Jeanie try to find a home for a schizophrenic architect. Carter signs Benton up for an interview with Vucelich for a prestigious study. Carter and Harper try to…

Anspaugh is furious when Carter tells him he wants to quit surgery. Charlie is brought in with an overdose. Mark keeps struggling with his beating.

Benton takes a day off to help Carla. Carter finds out Edson falsified a chart.

Benton tries to find out if everything’s OK with Carla’s baby. Carter tries to get a man operated, despite the fact Anspaugh thinks he will die no matter what.

Benton goes into Carla’s private hospital files when he fears that something may be wrong with their baby; Jeanie treats a suicidal woman who reveals a surprising secret; and Greene…

Carter faces his last day in the hospital with aplomb, harshly grading Benton on an evaluation report. He later rescinds the report after finding out that the surgical sub-I is…

Mark and Jennifer struggle to remain together as Mark has moved in with her in Milwaukee. Doug coaches Jake’s little league team. Chloe’s irresponsibility wears Susan down. Carter asks Benton…

Deb and Carter compete furiously for procedures after Benton announces their books are due a week earlier than previously announced. Deb commits a nearly deadly error on a patient while…

Mark, still upset over the loss of Jodi O’Brien, takes the night off but ends up in the ER anyway, albeit an hour late, when the new chief runs a…

Morganstern invites Mark to join the staff as an attending physician. Mark treats an woman with breast cancer, who begs him to kill her. Deb “wows” Benton with her amazing…

The air conditioning quits on the hottest day in October which, coupled with closed ERs in Chicago’s other two hospitals, leads to an extremely hectic day. Dr. Ross treats a…

A business contractor with a bad heart gathers his family around him in the ER as he prepares for the end. Dr. Ross helps an asthmatic teenage girl when her…

Carol returns after her eight week absence, finding Doug holding himself responsible. Carter finds himself watching over a mysterious, mentally ill singing woman. Susan clashes with Dr. Kayson over a…

Dr. Lewis tries to get a mentally disturbed individual admitted to the psych ward. Carter has a difficult day, treating many members of wedding party, suffering from food poisoning. Dr….

A day’s worth of trauma takes its toll on the men and women of the ER. Dr. Greene looks into leaving the ER and joining private practice. Among other events,…

With the horrors of the night behind them the survivors deal with the fallout of their choices.

When a rape victim is arrested for murder in Suffolk County, Detective Benson questions the case and finds enough evidence for District Attorney Barba to charge a different suspect in…