"Gone Maggie Gone" is the thirteenth episode of the twentieth season of the American animated television series The Simpsons.

The episode was written by both Billy Kimball and longtime Simpsons writer Ian Maxtone-Graham, and directed by Chris Clements.

In the episode, Homer leaves Maggie on the doorstep of a convent, but when she disappears, Lisa goes undercover as a nun to solve the mystery and find her.

The first clue is to "seek God with heart and soul," which she accomplishes by playing a few measures of the song by the same name on an organ, activating a Rube Goldberg-type contraption.

Arriving there, she meets Comic Book Guy and Principal Skinner, who tell her that St. Teresa of Ávila had a deathbed vision of a jewel that would bring peace and harmony to the world.

Robert Canning of IGN said: "as entertaining as the story was, it would not have made a difference if it weren't just as equally funny.

Overall, it was the combination of a fully engaging story and great laughs that made ‘Gone, Maggie, Gone’ another winner for The Simpsons in their post-hi-def series run.

"[8] Billy Kimball and Ian Maxtone-Graham were nominated for a Writers Guild of America Award in the Animation category in 2010 for writing the episode.