THE SIMPSONS: When Maggie disappears at a convent, Lisa goes undercover as a nun to solve the mystery. Meanwhile, Homer tries to keep Maggie's disappearance a secret from Marge, who was blinded while watching a solar eclipse in the "Gone Maggie Gone" episode of THE SIMPSONS airing Sunday, March 15 (8:00-8:30 PM ET/PT) on FOX.