I love the history of thematically competing tv shows that happen at the same (or roughly the same) time.

The Adams Family > The Munsters

Bewitched > I Dream of Jeannie

Parker Louis Can't Lose > Ferris Bueller (TV version)

The Real Ghostbusters > Ghostbusters (Cartoons)

Seinfeld > Friends

Garth Marenghi's Darkplace > Children's Hospital

The Bad Half: The Bastard Son & The Devil Himself > Chilling Adventures of Sabrina