GREY'S ANATOMY - "Trigger Happy" - The doctors work frantically to save a young boy who was accidentally shot. Meanwhile, Arizona is upset when Callie tries to make an important decision about Sophia's future without consulting her, on "Grey's Anatomy," THURSDAY, APRIL 21 (8:00-9:00 p.m. EDT), on the Walt Disney Television via Getty Images Television Network. (Photo by Richard Cartwright/Walt Disney Television via Getty Images) CATERINA SCORSONE, ZACKARY ARTHUR
