It's that time again. Soon you'll be packing off to your parents' place, for turkey and inquisition. But what's the worst that could happen? Your parents could be aliens, robots, pod-people or evil doppelgangers, according to science fiction and fantasy.
Top image: strip by Rozsdás, based on an idea from Robot Chicken, via Darths and Droids.
Your parents could be evil duplicates
And before you ask, "How would I be able to tell the difference?", consider how dreadful it could be:
Your parents could be aliens
It's also subverted somewhat in the sitcom My Parents Are Aliens, where the secret alien visitors are benign but clueless.
Your real father or mother could be your arch enemy
There are tons more examples of parents who turn out to be evil over at TVTropes, including Soranik Natu finding out Sinestro is her dad, and so on.
Your parents could be monsters or demons
What's the worst case scenario if your dad is the Devil? Probably that he's Al Pacino's Devil in 1997's The Devil's Advocate — Pacino's Devil wants his son (Keanu Reeves!) to have sex with his own half-sister, so the Devil can have an in-bred grandchild — the Antichrist. Also, Pacino gets his son Keanu to go work at his Satanic law firm, defending Satanic cultists, pedophiles and other upstanding members of society.
Additional reporting by Chelsea Lo Pinto and Katharine Trendacosta.