10 Best South Park Celebrity Cameos

Elon Musk is an interesting guy. Not only is he a technological pioneer, but he's also got a thing about popping up in cameos wherever he can. He's a nerd through and through. He appeared in The Simpsons (as himself); he popped up in the RIDICULOUS Machete Kills (as himself); he briefly appeared in Iron Man 2 (as himself); he showed up in Big Bang Theory (as himself); and he appeared in Rick and Morty (as, well, kind of himself). There's more, but the point has been made.

Naturally, Elon Musk popped into the South Park universe (because why not?) for three consecutive episodes. In the episodes "Members Only", "Not Funny", and "The End of Serialization as We Know It", Cartman wants desperately to go to Mars so that his new girlfriend, Heidi Turner, won't find out about his history of racism, sexism, misogyny, homophobia, xenophobia, antisemitism, etc. You know - Cartman.

Naturally, if you're talking about going to Mars, Elon Musk WILL be involved at some point or another. Cartman and Heidi go to SpaceX, and are given a tour by Musk. Over the course of the three episodes, Musk collaborates with Heidi to figure out how to get to Mars.