South Park (1997)

S2E1 Terrance and Phillip in Not Without My Anus

The episode kicks off by picking up from last season's intense cliffhanger about Cartman's father. Just when viewers think they’re diving into the second part of "Cartman's Mom Is A Dirty Slut," the narrative takes an unexpected twist. Instead, the show announces that for April Fool's Day, they will air a Terrance & Phillip special titled "Not Without My Anus."