Regular Show Wiki
Regular Show Wiki

"The Brain of Evil" is the eighth episode in Season 8 (and two hundred and twenty-fifth overall) of Regular Show. It aired on October 3, 2016.


Mordecai and Rigby accidentally release an evil brain.


The episode begins at the Space Tree where Benson tells Mordecai and Rigby that they can take the afternoon off.

The duo leaves and goes to a store, where the store owner tells them to not touch anything. During this time, Rigby finds an evil brain. The evil brain tells Rigby that he is just a country brain and he wants to go back to his family in the country. To Rigby's despair, he opens the cage and lets the brain out. Mordecai and Rigby then find out that the brain is evil, as said by the store clerk. He also tells the duo that the only way to beat him is in chess, but that was a long time ago, and he has gotten better since watching Chess TV.

Mordecai and Rigby chase the brain from the store to the park and the dome is blasted off into space. Colonel Rawls thinks that the dome is leaving without authorized personal, so he plans to blow it up. Meanwhile, the duo challenges the brain to a game of chess with a deal that Mordecai says, "Winner stays in the dome. Loser leaves the dome."

Mordecai and Rigby lose to the evil brain. Whilst he is distracted, the duo decides to trap him and then blast him out into space.


S8E08 The Brain of Evil Credits.png


  • Wallace Shawn makes a guest appearance as the Evil Brain.
  • The shopkeeper reveals that the Evil Brain is good at chess and managed to defeat him, but since he locked up the brain in a birdcage watching Chess TV, he has since become stronger and better at the game.

Episode Connections

  • One of the screen images of security cameras shows Pops sleeping with objects flying around him just like in "The Dream Warrior."

Pop Culture References

  • The store where they find the brain may be a reference to the store in the 1984 movie "Gremlins."

Production Notes

  • This marks the first episode to air during the fifth "Regular Show Bomb."
  • This episode received 0.82 million views, making this have the lowest amount of views in Season Eight, as well as the show itself.