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Kang and Kodos during their first appearance and are the most famous Rigellians

Rigellians are[1] from the planet Rigel 7. Their most famous members are Kang and Kodos, although Serak the Preparer is also Rigellian.

Biology and culture

Rigellians are approximately 7 feet tall, continuously drooling one-eyed beings with eight tentacles and red eye-pupils. They wear space helmets, but not space suits. They speak the Rigellian language, which, by coincidence, is identical to English. Their number four looks like a human skull[2]. Peculiarly, they occasionally vomit through their eye (which looks like tears), but Kodos said they 'always secrete ocular fluid at weddings'[3]. They must hold hands to exchange long protein strands. 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 5,000 years ago, by God). Despite the alien stereotype of doing anal probings on abducted people, Kang and Kodos, at least by the time of the 1996 Presidential Elections, were utterly disgusted by the practice, as when Homer mooned them in preparation of being anally probed, they recoiled and demanded that he stop immediately, stating that they've already "reached the limits of what rectal probing can teach us!".[4]


Rigel 7 is a rocky, desert-like planet with an asteroid field, that orbits the star Rigel. They are the only 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.


Rigellians have access to advanced technology including interstellar travel, ray guns, a fertilization ray, and in their society's standard of games, "Pong".

Rigellians (by name)


The overall appearance of Kang and Kodos is derived from the aliens appearing on the cover of an old EC Comic. They are named after two characters from Star Trek; Kang, a Klingon captain, and Kodos the Executioner, a human villain. Their cook, Serak the Preparer, 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 7, 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 I, is in the episode "Wolf in the Fold".

Behind the Laughter

In The Simpsons: Hit and 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.

Based on some of the alien taunts in The Simpsons Game, another name for the Rigellians were "Homo Aliens" (a clear pun on "homo sapiens", the scientific name for humanity).



  1. Treehouse of Horror wraparounds
  2. Treehouse of Horror XIII, The Island of Dr. Hibbert.
  3. Stated in Treehouse of Horror XII, Hex and the City.
  4. Treehouse of Horror VII, Citizen Kang