This week, in an exclusive interview with Entertainment Weekly, the actor reveals what led him to his decision, and he also candidly discusses "Isaiahgate," coming out of the closet, and leaving his friends at Seattle Grace.
This fall, Knight was surprised to see his character George O'Malley all but vanish from the show -- for the first nine episodes of season 5, he appeared on screen a total of only 48 minutes, compared to 114 for Sandra Oh's Christina. Still, due to what he calls a gradual "breakdown of communication" between himself and exec producer Shonda Rhimes, the actor chose not to ask his boss what was going on with his character. Instead, he simply asked to leave. "My five-year experience proved to me that I could not trust any answer that was given [about George]," he explains. "And with respect, I'm going to leave it at that."