By EW Staff
Updated August 18, 2007 at 04:00 AM EDT
Dean Hendler

9-10 PM · FOX · Returns Sept. 25

Who’s in the House house for season 4, since the doc’s young staff bolted in last season’s finale? Exec producer Katie Jacobs says Hugh Laurie’s persnickety pill-popper is ”working by himself” at first and then is ordered to assemble a new team: ”We have 40 [candidates], and he’s just going to keep firing people every episode until we get down to two by episode 8 or 9.” Among the new faces: The O.C.‘s Olivia Wilde, 24‘s Kal Penn, and Lincoln Heights‘ Edi Gathegi playing a medically minded Mormon. And fret not about the old faves — they’ll all be back: ”Chase [Jesse Spencer] is going to work in surgery, Cameron [Jennifer Morrison] is going to work in the ER, and Foreman [Omar Epps] truly has been at another hospital, in New York,” but will return. In the meantime, says a laughing Lisa Edelstein, who plays boss Cuddy, ”This many people — it’s just kind of crazy, and each week more people get voted off the island!”