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Watch The Simpsons Season 18 full episodes online, free and paid options via our partners and affiliates.

Nelson Threatens Bart
Watch The Simpsons Season 18 Episode 8
"The Haw-Hawed Couple"
Original Air Date:

Bart becomes Nelson's best friend, and discovers how possessive Nelson can be. Meanwhile, Homer finds himself hooked on one of Lisa's fantasy books.

Watch The Simpsons Season 18 Episode 4
"Treehouse of Horror XVII"
Original Air Date:

The Simpsons' annual Halloween hodgepodge. Phil McGraw, Richard Lewis, Fran Drescher, Sir Mix-a-lot and Maurice LaMarche guest star.

The Simpsons Season 18 Quotes

Did someone say snack?


I'm so sick of Gil, he ruins my Thanksgiving, uses my leg razor to peel his carrots

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