"The Show Must Go On is the 245th episode of the NBC television series ER.
Plot synopsis
Dr. John Carter is back in the States to wrap up his affairs. He purchases half a dozen pizzas for the ER staff, as well as some refreshments. He also treats a patient who has injured her wrist. Ray is dealing with whether he wants to go into his residency as a doctor. Dr. Archie Morris and Dr. Ray Barnett leave for another party. This party is held on several floors in the back of an apartment building on the balconies at each level. Morris promptly becomes intoxicated, and begins vomiting. Barnett goes to help him. Suddenly the porches collapse, one on top of each other. Carter then leaves with Dr. Kovač for his "surprise" farewell party, where most of the attending doctors and his friends are waiting for him. County General then stops accepting trauma patients after further problems with the sewer pipes in the hospital leaves them with only one operating room, coupled with the fact that the majority of the ER staff is at Carter's party. 6 people are killed in the porch collapse, and some are not hurt too badly. Five more are critically injured in the accident. Barnett surprises his friends with his handling of the situation. The paramedics on the scene tell Barnett that they are going to take the critically injured to St. Rafe's Hospital because County is closed. County is the only Chicago hospital that has Level I Trauma Status in the show, making it the first choice for such situations. Barnett uses the radio to call County and demands that Abby reopen the ER, otherwise the five critical patients would probably not make it to the hospital. Dr. Lockhart initially refuses, as there are no attending physicians and only one OR, but when one of the critical patients dies, she relents. Unable to reach Dr. Kovač by pager, they send a student over to fetch him. The party immediately evaporates, as everyone runs back to the ER to help the victims of the porch collapse. A surprised Carter returns from the restroom to empty tables, except for an orderly he doesn't know. They spend some time watching a slideshow of his time at County. The presentation features past ER doctors, including Dr. Doug Ross, Dr. Mark Greene, and Dr. Peter Benton. Eventually Dr. Susan Lewis brings Carter back to the ER. Life comes full circle for Carter when he treats one last patient before leaving County General. He is surprised to learn that he delivered the young girl with the broken wrist 11 years ago in Season 1. Before he leaves he stops by to see Ray, Neela and Abby and shares the letter he wrote to himself as an intern under Dr. Greene, that had sat in his locker until this point. As Carter is leaving the hospital for the last time, Dr. Greene and Dr. Benton and Nurse Carol Hathaway are heard in voice-overs. Outside, he finds a fatigued and partially sober Morris crouching outside. Carter repeats the advice that was given to Dr. Greene by Dr. Morgenstern to the new chief resident: "You set the tone." However, Morris, still suffering from the hangover, barely registers the advice and Carter, with a chuckle, goes to catch his train. And Carter leaves the ER and Chicago to be with his wife, Kem.
This is the final episode with Noah Wyle,, as a regular cast member, although he has several guest appearances in later episodes. This is Scott Grimes' final episode as a guest star as he moves on to become a regular cast member in season 12, playing character Archie Morris.
