In the good old days (the 1970's), many successful TV series were actually spin-offs from other successful TV series. For example, Mork and Mindy and Laverne and Shirley were successful spin-offs from Happy Days (above). But did you know that Happy Days was a spin-off from Love, American Style..? You did, huh? Well, did you know Happy Days also spun off three really crappy shows - Blansky's Beauties, Out of the Blue, and Joanie Loves Chachi...?
This site is all about TV spinoffs and crossovers. Enjoy.