Grey’s Anatomy 12×21 “You’re Gonna Need Someone on Your Side” Sneak Peek – Callie approaches Alex and says she needs his help, as her friend and as a respected pediatric doctor. After listening to her speech, he suddenly realizes what she wants. “Are you asking me to take the stand for you, for your custody thing?” he asks. How can Callie ask Alex to side with her, and against Arizona? Will the battling exes expect all of their mutual friends to take sides?