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Donut Homer.png The contents of this article or section are considered to be non-canon and therefore may not have actually happened or existed.
Several Rigellians drinking Hillarium.

Rigellians are aliens from the planet Rigel 7. Their most notable members are Kang and Kodos, although Serak the Preparer is also Rigellian.

Biology and culture[edit]

Kang and Kodos.

Rigellians are approximately 7 ft. 0 in (2.13 m), continuously drooling saliva, one-eyed beings with five tentacles. While not on their planet, they wear space helmets, but not space suits. They speak the Rigellian language, which, by coincidence, is identical to English. However, there are some slight differences, such as screaming being considered a synonym for "beautiful".[1] Their number four looks like a human skull.[2] Peculiarly, they occasionally vomit through their eye, which resembles human crying,[3] but Kodos said they "always secrete ocular fluid at weddings".[4] They must hold hands to exchange long protein strands.[5] They have declared that their religion is to be "Quantum Presbyterians", and that they were present at the beginning of the universe (when it was created five thousand years ago, by God).[3]

Home world[edit]

Rigel 7 in the future.

Rigel 7 is a rocky, desert-like planet with an asteroid field, that orbits the star Rigel. They are the only intelligent form of life on the planet, and their sole preoccupation is assembling a galactic empire for their planet, starting with the conquest of Earth. Kang and Kodos once claimed to live near a ringed planet close to the Earth, implying that it is Uranus.

Years in the future, Rigel 7 is a planet full of lush vegetation and animals where everything can be dangerous. The Rigellians live in peace with the other animals who are adapted to fight wars for some reason. They are led by the Rigellian queen who produces Hillarium for the Rigellians to drink.[6]


Rigellians have access to advanced technology including interstellar travel, ray guns, and the video game "Pong.", which in Rigellian society is considered to be cutting-edge.[7] In the future, they seem to downgrade and become a primitive race and live in peace with nature and the animals.[6]

They also have special guns that can impregnate humans.[8]

Behind the Laughter[edit]

In The Simpsons: Hit & Run, it is shown that not all members of the Rigellian species are green. The game's ending features Rigellians of various colors, including red, yellow, blue, pink, red orange, light aqua-green, light blue, dark pink, tan, and orange. However, this is considered non-canon.


The overall appearance of Kang and Kodos is derived from the aliens appearing on the cover of an old EC Comics. They are named after two characters from Star Trek; Kang, a Klingon captain, and Kodos the Executioner, a human villain. Their cook, Serak, derives his name from an inversion of vowels in the name Sarek, the Vulcan father of Spock.

Star Trek would often mention planets in the Rigel system. Rigel VII, the home of Kang and Kodos, is mentioned in the original Star Trek pilot, "The Cage". Rigel IV, to which Kang and Kodos intended to take the Simpson family in "Treehouse of Horror", is in the episode "Wolf in the Fold".



  1. "Treehouse of Horror XXX" ("When Hairy Met Slimy")
  2. "Treehouse of Horror XIII" ("The Island of Dr. Hibbert")
  3. 3.0 3.1 "Gump Roast"
  4. "Treehouse of Horror XII" ("Hex in the City")
  5. "Treehouse of Horror VII" ("Citizen Kang")
  6. 6.0 6.1 "Treehouse of Horror XXII"
  7. "Treehouse of Horror" ("Hungry Are the Damned")
  8. "Treehouse of Horror IX"