It's a toss-up as to who is more disgusted by the news that Meredith (Ellen Pompeo) has slept with Derek (Patrick Dempsey): Meredith's roomies Izzie (Katherine Heigl) and George (T.R. Knight), or the interns' granite-faced supervisor Bailey (Chandra Wilson). Back at Seattle Grace, Derek picks George to assist him during an extremely delicate brain operation, but George may lose the opportunity if he speaks up about the drinking problem of veteran anestheseologist Dr. Taylor. Elsewhere, Izzie performs emergency surgery on a disgruntled gent who has swallowed his girlfriend's car keys; Alex (Justin Chambers) meets a fellow former wrestler named Owens (Russell Hornsby), who has developed a morbid fascination with self-mutilation; and several of the interns become involved in the plight of a teenager who is suffering the aftereffects of a botched gastric bypass operation. ~ Hal Erickson, Rovi