enter the emergency room, so Robbins and resident Dr. Alex Karev (Justin Chambers) order a 3D MRI, which is denied by the chief of surgery Dr. Richard Webber (James Pickens, Jr.). On his way to a meeting, Webber goes through a red light, and collides with another vehicle, resulting in him becoming T-boned. Webber is taken to the neighboring Mercy West Hospital, where he is treated by former colleague Dr. Callie Torres (Sara Ramirez), and subsequently discharged. Ferguson finally agrees to the surgery, after constant pleads from Lexie, and makes a start to physical therapy. Lexie returns home to see her sister Dr. Meredith Grey (Ellen Pompeo) and her new husband Dr. Derek Shepherd (Patrick Dempsey) having sex in the kitchen. Dr. Izzie Stevens (Katherine Heigl) is at home, begging her husband Karev to spend time with her, but he dismisses her. At Dr. Mark Sloan (Eric Dane)'s apartment, his girlfriend Lexie has moved in, and his bisexual ex-girlfriend Torres walks in on Sloan in the shower. Lexie expresses her concern to Torres about doing this, and she apologizes. Robbins confronts Shepherd, the hospital's chief of neurosurgery, and asks him to run an expensive test to see if Andy has Tethered spinal cord syndrome, which reveals that he has it, and it is reversed through surgery. Stevens notices the girl Dr. George O'Malley (T.R. Knight) saved, Amanda (Shannon Lucio), sitting outside the hospital, and tells her to go get a life, because O'Malley did not save her so she could be miserable. At the conclusion of the episode, Stevens unites with Karev, and Webber announces that Seattle Grace will be merging with Mercy West. Production "Goodbye" was written by Krista Vernoff and directed by Bill D'Elia. Joe Mitacek edited the episode and Donald Lee Harris served as production designer. Featured music includes Fanfarlo's "Ghosts", Katie Herzig's "Hologram", Lucy Schwartz's "Gravity", and Emilíana Torrini's "Today Has Been OK". "Today Has Been OK" played while Shepherd (Dempsey) was consoling Bailey (Wilson) about O'Malley's (Knight) death, in the elevator. This song was originally played in the season 2 episode "Into You Like a Train", when Bailey was consoling Shepherd. This is the only time the series has reused a song. "Goodbye" is the second hour of the season 6 premiere. It was the first premiere not to feature Knight's character, O'Malley. Knight was released from his contract at the conclusion of season five,