When it plays: Grey's Anatomy, of course, uses Sleeping at Last's tender indie spin on Ella Fitzgerald's "Someone to Watch Over Me" in its much-anticipated two-part 15th season premiere. In the episode, the song plays when Maggie and Meredith tell their matchmaker patient that the person she accidentally hit has passed. For Omelia fans, it's also when Owen tells Amelia that he wants "strings attached."