It looks like Derek's (Patrick Dempsey) surgery-less days may be coming to an end on Grey's Anatomy Season 9. But first, he's going to have to put up with an unusual treatment on Episode 11: "The End Is the Beginning Is the End" (January 17). In this clip Callie (Sara Ramirez) suggests Derek build up strength by playing ping-pong. A lot of ping-pong. And surprise! She's not his partner. Who does she rope into helping with this odd task? Watch the sneak peek below to find out.