George O'Malley

Knight auditioned for the show, expecting a one-season run. In 2007, Knight's co-star Isaiah Washington (Preston Burke) insulted him with a homophobic slur, which resulted in the termination of Washington's Grey's Anatomy contract. In 2009, after the conclusion of the fifth season, it was confirmed that Knight would not be returning for the show's sixth season. The actor stated the reason for his departure was due to a ``breakdown in communication'' with Rhimes, his character's lack of screen time, as well as his decision to come out as openly gay. Knight received generally positive reviews for his performance as O'Malley, and garnered a nomination for Outstanding Supporting Actor in a Drama Series at the 59th Primetime Emmy Awards. Despite this, his death received mixed feedback.

Question: does george ever come back to grey's anatomy
Answer: no