to blame. An amputation is not taken lightly, so obviously it had to be amputated. But how that decision came to pass is going to be something she has to have a very strong reckoning with. TVLINE | Has it been a challenge to shoot your scenes this season? These special effects guys are amazing. I don't know how they do what they do. Because, obviously, we're filming the scenes with my leg there, and then they have this whole process by which they digitally remove my own leg and then they create something -- and that's what the residual limb you saw was. TVLINE | How dark does it get for Callie and Arizona? I think as dark as [it can] get. Listen, the obvious thing to remember is without dark there is no light and without light there is no dark. You have to show the differences between things. And right now it's really dark. She's so steamin' mad. We're not aiming to tell a story of defeat, so what goes up must come down, but she is steamin ' mad and looking for anyone and everyone else to blame but herself... Ever since she got back from Africa everything has happened to her. She found out that her girlfriend got pregnant, then she took on being a mom, then she got in a car accident... there's so much that's been happening to her and she's always risen to be the good man in the storm. And I