* CompletelyDifferentTitle:
** Known in France as ''Alien Theory'' (untranslated).
** Known in Québec as ''Nos ancêtres les extraterrestres'' (''Our Alien Ancestors'').
* ReferencedBy: Thanks to MemeticMutation, the ''Aliens'' meme has been referenced in popular culture for a good while.
** The aliens meme was referenced at in issue 0 of ''ComicBook/StreetFighterVsDarkstalkers'' during a conversation of ClarkesThirdLaw.
** Name-dropped in one of Music/LemonDemon's most popular songs, Touch-Tone Telephone, as well as having a shared name with another song in the same album.
** The ''WesternAnimation/SouthPark'' episode "A History Channel Thanksgiving" is centered on [[ShowWithinAShow a parody of the show]], which demonstrates the Thanksgiving holiday commemorates aliens (both the Pilgrim Fathers and the Indians, who appeared onscreen as Grey Aliens in Pilgrim[=/=]Indian costumes). Turns out there's truth in it.
** Tsoukalos himself appeared in an episode of the dramedy ''Series/ResidentAlien'', "[[Recap/ResidentAlienS1E9WelcomeAliens Welcome Aliens]]," hosting an ''Ancient Aliens'' panel at a scifi convention. And since it's a show where all the stuff they talk about in ''Ancient Aliens'' is true, the main character is blown away by how knowledgable Tsukalos is.