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It has been confirmed by E! Online that T.R. Knight has been signed for the full season, and not 12 episodes as some rumors floating around the Internets suggest.
I tell you this, because, apparently, there is a rumor floating around—which started somewhere in the mysterious ether of the World Wide Web—that T.R. only signed on for 12 episodes this season. And a handful of you have sent in panicked Q’s asking if this is true.
While the show’s official rep at ABC says she never comments on the details of actors’ contracts, an inside source close to the show tells me this is most definitely not true. I’m told T.R. has signed on for all episodes of the upcoming fourth season and that he never would have been given his recent pay hike had he only signed on for half of the episodes.
As for the storyline, you may remember that George McStupiePants (kidding! I do love him) flunked his intern exam at the end of last season, thanks to the distraction of a certain she-devil who may or may not appear in the picture above. Still, I can assure you he will find a way to stay at Seattle Grace—full time.
Source: E!Online
So George is back 100%. Good news for all 
Via | SpoilerTV
Ow ow! Look at that blue hair, I love it.
And I’m so glad he’s staying for another full season.
Yack, he looks terrible on this picture… I’m not too keen on the blue hair…
he is staying????
What a bummer!!!