How I Met Your Mother:
Season:     4     / Episode:     21    
The Three Days Rule

The show centers on a pair of teenagers, Beavis and Butt-head, who live in the fictional town of Highland. They while away their time in sarcastic conversation, fantasizing about sex and masculinity, although they have no real-world experience with either thing. They attend Highland High (based on a real high school in Albuquerque, New Mexico, where Judge grew up) and occasionally work at part-time jobs, putting as little effort as possible into everything they do. They survive their misadventures without serious consequences, and with a generally contented, though critical (not apathetic) worldview. During each episode, Beavis and Butt-head watch and make fun of two or three music videos.

Ted meets Robin, and Marshall and Lily get engaged. Ted tells Robin he loves her on their first date and ruins his chances. Robin ends up not being the mother because Ted explains that this is how he met the kids' 'aunt' Robin.