Are there real-live aliens living among us? Fox Mulder isn't the only one who wants to believe. Although we don't have any hard evidence to support the theory that aliens have blended in to our culture on earth, and are living among us undetected, this list of fictional alien characters have certainly invaded mainstream pop culture.
Some alien visitors are completely benign, like the Coneheads. Others - like Martian Manhunter, Superman, and Thor - are god-like superheros that protect and serve their new earthling families. Then, you've got hilarious Stitch, evil Invader Zim, and level-headed, half-bred Spock. Aliens from movies and TV hold a mirror up to human beings, and force us to confront our own humanity.Vote up your favorite fictional alien friend from the list below, and be sure to let us know what you think in the comment section.