20 Best South Park Episodes Ever
9. Cartman's Mom Is A Dirty Slut (Season 1, Episode 13)
A classic from the show's very first season that sees the gang attempting to figure out the identity of Cartman's father.
The episode does a great job building up the possibility of just about anyone being Cartman's dad, from Chief Running Water to Mr Garrison, Chef and even the Denver Broncos. Whatever your opinion on the reveal next season (that a hermaphoditic Mrs. Cartman is in fact his father), this was a terrifically amusing cliffhanger all in its own right.
Best Moment: The parody of Celine Dion's hit tune My Heart Will Go On, complete with the lyrics "There you are / Like a throbbing star" every time Cartman's mom gets hot for someone on the night of Eric's conception.