A TV series or film that takes inspiration and characters from another but does not directly continue the story in the manner of a sequel. To be used for question pertaining to the intricacies of spin-offs specifically, not for any kind of question about some spin-off.
Happy Days maintained a fairly realistic bent throughout it's run (I'm not here to debate shark jumping, I promise). Two notable detours from this were Mork and Mindy and Out of the Blue. Mork ...