When Homer leaves Maggie on the doorstep of a convent to keep her safe as he rescues Santa's Little Helper from a sticky situation, the nuns at the convent take Maggie in. Lisa comes up with a plan to infiltrate the convent and rescue Maggie. After deciphering a series of cryptic messages at the convent, Lisa sets off to find Springfield's most coveted jewel and gets a little help from an ancient order of mystery buffs led by Comic Book Guy and Principal Skinner. But when Springfield's Freemasons, led by Mr. Burns, get wind of Lisa's quest, she must race to solve the mystery and find Maggie.
FAN DESK VERDICT An all-timer. This is the episode you show someone to explain why The Simpsons matters — clear the evening and watch it properly.
The Simpsons S20E13 (“Gone Maggie Gone”) first aired on March 15, 2009.
In the US, The Simpsons season 20 — including this episode — is available on FX, Hulu, Disney+, fuboTV, DirecTV On Demand, Spectrum On Demand, YouTube TV, FOX One Amazon Channel, Hulu on Disney+, Amazon, Fandango at Home, and AppleTV.
Guest stars include Ed Begley Jr. (Ed Begley Jr. (voice)).
The Simpsons S20E13 (“Gone Maggie Gone”) was directed by Chris Clements and written by Ian Maxtone-Graham and Billy Kimball.
Fans rate The Simpsons S20E13 (“Gone Maggie Gone”) 8.8/10, which puts it in the essential tier for The Simpsons.