Grey's Anatomy 12x10 “All I Want Is You” “All I Want Is You” – As the hospital deals with Meredith’s trauma, Callie and Maggie perform a risky, experimental surgery on Alex’s 15-year-old patient against his professional opinion. Meanwhile, Owen and Nathan are still at odds with each other, and Maggie and Andrew’s relationship continues to develop on “Grey’s Anatomy,” THURSDAY, FEBRUARY 18 (8:00–9:00 p.m. EST) on the ABC Television Network.