"Battle of the Brainteasers" is a season 2 episode that aired on November 2, 1991.
Alien hats from outer space invade earth, take control of a slew of nuclear weapons, and demand to be made rulers of the universe.
- "You've got to stand up to people, Honker. Show some guts!"
- "I'm afraid Tank will do the showing with my guts!"
- — Gosalyn and Honker on Tank.
- Herb watches Pelican's Island, a parody of the TV sictom, Gilligan's Island.
- Flarg's line of "Never mind her, we've got to phone home!" evokes the famous line "E.T. phone home," from the 1982 movie E.T. the Extra-Terrestrial.
- The Brainteasers' home planet will be revealed in "The Revenge of the Return of the Brainteasers, Too!" to be Fez.