levels that had not happened or been around for Arizona in this particular story." So it was shocking, but once I kind of leaned into it [I realized it] was rife with possibility. This was like a wallop of a new dimension to play. TVLINE | Were you relieved that at least they didn't kill you off? [ Laughs ] I was very happy to stay. TVLINE | Was it hard keeping the secret? Yes it was. Shonda had asked me to [not discuss it publicly]. I was laughing because one of the reasons I went on Twitter at all was because you could hear from people who were watching the show and answer questions, and all of a sudden I was left with nothing to talk about. So I was pretty much the most boring tweeter ever . I was boring myself . [ Laughs ] It's been a couple of days since I tweeted so maybe I should tweet my breakfast ? TVLINE | In Thursday's premiere, Arizona seemed to blame Callie for her lost limb. Why? You saw in the preview for the next episode that Arizona says to Callie, "Just don't let them take my leg." There's almost an implicit, "I'd rather not be here then lose my leg." That's how desperate she is about not wanting to lose her leg. But, ultimately, she does. And she has to blame someone. In the coming episodes you will see who was responsible -- not necessarily who was