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Like I said before son, the truth is out there.
Wayne talking about Aliens to Sam
in Clap Your Hands If You Believe

Aliens are of yet unconfirmed species that may or may not exist outside of Earth.


Aliens have not appeared officially and are mostly regarded as fiction. Those who believed in aliens are seen as delusional or mentally unstable. Aliens are generally believed to be small grey men with big black eyes.

Season 2

Curtis dancing with the "alien"

In Tall Tales, Gabriel conjured aliens and used them to abduct a college student named Curtis. Curtis was visibly shaken by the experience, and recalled the aliens prodding him and forcing him to slow dance.

Season 6

During Clap Your Hands If You Believe, a leprechaun known as Wayne Whittaker posed as a UFO-specialist after being summoned to Earth. His kin, the fairies, began kidnapping all first-born sons in an incident that was believed to be the result of alien abductions. The abductions also led to a gathering of UFO watchers, one of them being Sparrow Jennings.

Season 8

In the episode A Little Slice of Kevin, one of the future prophets gathered by Crowley assumed Crowley was an alien at the meeting. Another prophet asked if they were on Crowley's spaceship.

Season 10

In About a Boy, a homeless man who witnessed JP's abduction by Hansel claimed the abduction was done by aliens.

Season 11

In The Chitters, when people started disappearing in Gunnison, Colorado, Dean Winchester wondered if aliens were responsible. The true culprit was a Bisaan.

Season 12

In Somewhere Between Heaven and Hell, as a conspiracy theorist, Herb Nelson believed in many seemingly ludicrous ideas such as the Men in Black, the Moon landing being a hoax and the Queen of England being an alien called a Reptilian.

Season 14

In Moriah, the Queen of England is revealed to be a Lizard when Jack Kline forces people to tell the truth.

Supernatural: The Animation

During the episode Savage Blood, the locals blame aliens for the cattle mutilations.



  • Tall Tales marks the only episode where a viewers see a manifestation of an alien in the show. However, these weren't real aliens, but just an illusion created by Gabriel to scare Curtis.
  • According to Eric Kripke, there are no such thing as aliens in the Supernatural universe.
    • However, the beings Yokoth and Glythur from the Season 13 episode The Thing are modeled after the old gods of H.P. Lovecraft's work. While aliens are unconfirmed to exist in the main universe despite many hints that there's more to the universe beyond Earth, Yokoth and Glythur consumed entire galaxies in their universe, making them the closest things to aliens so far in Supernatural.
    • In addition, the supernatural creatures called Khan worm are clearly inspired by an alien theme, as their name refers to the parasitic Ceti Eels from the movie Star Trek 2, and their variant version is very similar to a Goa'uld, a parasitic alien race from the show Stargate SG-1.
    • Death also refers to the Leviathans as "The Old Ones", a term used by H.P. Lovecraft in the Cthulhu mythos to describe ancient powerful alien beings who come to Earth. Additionally, in the synopsis for Supernatural: The Complete Seventh Season (DVD), the Leviathans were also referred to as an alien force.
  • In Moriah, the Queen of England is revealed to be a Lizard when Jack Kline forces people to tell the truth although it's unclear as to whether Lizard People are monsters or aliens in the Supernatural universe. Besides, this situation is a reference to the comic Where's the Doctor? from Doctor Who franchise in which a variety of aliens constantly appear.