By the end of the season, a number of doctors are gone, none more significant than the two original cast members. Benton's exit is like the doctor himself: clean, efficient, and with barely a hint of emotion. And Greene's departure is also fitting: unable to separate himself from the ER, he stays at work till nearly the bitter end, when he finally relents and takes a trip to his boyhood home of Hawaii, where Iz's Island-flavored rendition of "Over the Rainbow" proves especially moving in the season's penultimate episode, "On the Beach." Other cast members include Julie Delpy as a barmaid who takes a liking to Kovac, Mekhi Phifer as new hotshot intern Greg Pratt, Mary McDonnell and Michael Gross as Carter's parents, Christina Hendricks as Abby's battered neighbor, and Molly Price and Jason Wiles as New York cops in a crossover episode with Third Watch. Bonus features include a gag reel and deleted scenes, including eight from "On the Beach." --David Horiuchi