Stupidity: When they are conferring before surgery everyone is keeping scrub except for Avery who has his arms crossed. Shortly afterwards you can see him look around at all his co-stars, realise he screwed up and try to casually raise his arms. (00:15:00)
Grey's Anatomy (2005)
1 stupidity in season 12
Continuity mistake: When Derek and Richard are in the lift talking, you can see Richard's head bandages under his hat. But when he removes his hat, his head is bare. (00:03:20)
Katie Bryce: My head is full.
Dr. Meredith Grey: It's called thinking. Go with it.