Well, if it's done on Grey's, I'm not sure it counts as being done. (I was more concerned that House's conceit in the finale had been done in the same series three seasons ago, albeit to a much larger degree.) I wouldn't mind if Amber was added to the main cast, actually, and was a recurring presence a la Virtual Six/Baltar; Anne Dudek's too awesome to let slip away, if it didn't mean House losing his license....

And I enjoy Castle -- it gets by on Fillion's capacity for rakishness, but I'm somewhat enthralled by Stana Katic's head. (And that she's like an off-brand Mariska Hargitay helps, I'm sure.) Anything that gets Fillion more work I'm all for.