20 Best South Park Episodes Ever

Few episodes have realised Cartman's douchebaggery as well as this (and that's really saying something), as he tries to overcome his worst instincts and be a better person in order to get invited to Kyle's birthday party at Casa Bonita.

Naturally, he fails with hilarious results and concocts an outrageously contrived scheme instead, trapping Butters inside a fallout shelter...and then a fridge.

More so than almost any other episode, Casa Bonita truly illustrates how utterly sociopathic Cartman is, notably when he can't tell the difference between wearing a sweater to seem nice, and actually just being nice.

Best Moment: Cartman elaborately convinces Butters of an apocalypse so he can go to Casa Bonita in his place, eventually leading to Butters attempting to repopulate the Earth by hitting on a female garbage dump employee.