Watch The Simpsons Season 21 full episodes online, free and paid options via our partners and affiliates.

Moe and Simon Cowell
Watch The Simpsons Season 21 Episode 23
"Judge Me Tender"
Original Air Date:

After judging local events in Springfield, Moe gets sent to Los Angeles to join the cast of American Idol judges.

Sideshow Bob is Back!
Watch The Simpsons Season 21 Episode 22
"The Bob Next Door"
Original Air Date:

When the Simpsons get a new neighbor with a familiar voice, Bart swears it's his old nemesis, Sideshow Bob, but no one believes him.

Happy Mothers Day
Watch The Simpsons Season 21 Episode 21
"Moe Letter Blues"
Original Air Date:

While on a Krusty day cruise, Homer, Reverend Lovejoy and Apu all get a letter from Moe saying he's running off with one of their wives.

The Queen on The Simpsons
Watch The Simpsons Season 21 Episode 20
"To Surveil With Love"
Original Air Date:

After Homer's Duff duffel bag gets blown up with hazardous materials in it, the town gets retrofitted with surveillance cameras on every corner.

Bluella the Whale
Watch The Simpsons Season 21 Episode 19
"The Squirt and the Whale"
Original Air Date:

Homer installs a wind turbine behind his house; Lisa becomes attached to a beached whale.

Homer and the Chief
Watch The Simpsons Season 21 Episode 18
"Chief of Hearts"
Original Air Date:

Homer gets stuck doing community service and bonds with Chief Wiggum; Bart becomes obsessed with a Pokemon-style battle balls game.

Mr. Burns in Prison
Watch The Simpsons Season 21 Episode 17
"American History X-Cellent"
Original Air Date:

When Mr. Burns ends up in jail for stealing art work, Smithers ends up running the power plant.

Sacha Baron Cohen on The Simpsons
Watch The Simpsons Season 21 Episode 16
"The Greatest Story Ever D'ohed"
Original Air Date:

Ned takes Homer and family to Israel where Homer has an epiphany and thinks he's the Messiah.

Nikki Steals a Kiss
Watch The Simpsons Season 21 Episode 15
"Stealing First Base"
Original Air Date:

Bart ends up stealing a kiss from a girl at school, Nikki (guest voice Sarah Silverman); Michelle Obama comes to visit Lisa.

Lisa Catches Bart
Watch The Simpsons Season 21 Episode 14
"Postcards from the Wedge"
Original Air Date:

To get out of homework, Bart pits Marge against Homer and puts their marriage in danger.

Eliza and Virgil
Watch The Simpsons Season 21 Episode 13
"The Color Yellow"
Original Air Date:

During Black History Month, Lisa reads the story of her ancestor, Eliza Simpson, who helped a slave, Virgil, escape on the underground railroad.

Simpsons Take the Gold
Watch The Simpsons Season 21 Episode 12
"Boy Meets Curl"
Original Air Date:

Homer, Marge partner with Seymore and Agnes Skinners to make it to the Olympics for curling; Lisa becomes addicted to collecting pins.

Coldplay on The Simpsons
Watch The Simpsons Season 21 Episode 11
"Million Dollar Maybe"
Original Air Date:

Homer wins the lottery but can't tell Marge because he bought the ticket when he was supposed to be at a wedding with her.

Krusty and Penelope
Watch The Simpsons Season 21 Episode 10
"Once Upon a Time in Springfield"
Original Air Date:

In the 450th episode of The Simpsons, the onstage and behind-the-scenes rapport between Krusty and his new female sidekick Princess Penelope (guest voice Anne Hathaway) grows.

Grandpa and Marshall
Watch The Simpsons Season 21 Episode 9
"Thursdays with Abie"
Original Air Date:

Marshall, a human interest journalist, writes a weekly column about Abe's stories; Bart takes Larry the Lamb on an adventure.

Cooper, Eli and Peyton Manning on Simpsons
Watch The Simpsons Season 21 Episode 8
"O Brother, Where Bart Thou?"
Original Air Date:

Episode recap to come after "O Brother, Where Bart Thou?" airs.

Homer and Moonshine
Watch The Simpsons Season 21 Episode 7
"Rednecks and Broomsticks"
Original Air Date:

Lisa tries to join some Wiccans but when they're busted by Wiggum, she serves as the chief witness; Homer hangs out with Cletus after discovering he makes moonshine.

Bart and Andy on Boner Way
Watch The Simpsons Season 21 Episode 6
"Pranks and Greens"
Original Air Date:

Principal Skinner tells Bart about Andy Hamilton, a former student that was a better prankster than Bart. Bart tracks down the 19 year old and they become friends.

Marge and Ned Share Fruit
Watch The Simpsons Season 21 Episode 5
"The Devil Wears Nada"
Original Air Date:

To raise money for her charity, Marge and the "Philanthro-Chicks" calender. Although reluctant at first, the photographer loosens her up and before long she's the talk of the town.

Moe Seduces Marge
Watch The Simpsons Season 21 Episode 4
"Treehouse of Horror XX"
Original Air Date:

The annual Halloween special for the Simpsons is broken into three stories: Dial "M" For Murder; Don't Have a Cow, Mankind; and The Musical.

Marge Takes the Mic
Watch The Simpsons Season 21 Episode 3
"The Great Wife Hope"
Original Air Date:

The men of Springfield all become obsessed with a MMA and Marge begins to protest the show. The creator of the sport agrees to take it off the air if she can defeat him in a fight.

Mrs Krabappel Drunk
Watch The Simpsons Season 21 Episode 2
"Bart Gets a Z"
Original Air Date:

Bart spikes Mrs Krabappel's coffee with alcohol, getting her fired. Though he feels guilty, Bart loves his cool new teacher Mr. Vaughn.

Everyman and His Trainer
Watch The Simpsons Season 21 Episode 1
"Homer The Whopper"
Original Air Date:

In the twenty first season premiere, written by Seth Rogen, Comic Book Guy's comic, Everyman, becomes popular and it's made into a movie. Homer is cast as the lead role, but struggles staying in shape for the role.

The Simpsons Season 21 Quotes

Comic Book Guy: You are acceptable!
Homer: Great, would you like to see me naked?
Studio Exec: Oh, there's no nudity in this movie
Homer: What movie?

I played hardball with hollywood, the closest i will ever come to playing a sport in my life

Comic Book Guy