10 TV Show Spin-Offs That Are Practically Flawless

10. Mork & Mindy

From: Happy Days.

Running for 95 episodes spread over four seasons between 1979 and 1982, Mork & Mindy is one of the more unexpected and genuinely odd TV spinoffs ever produced, inspired by Robin Williams' iconic two-episode stint on the sitcom Happy Days.

Following an alien who's sent to earth to observe human behaviour, the sci-fi comedy adopted a straightforward narrative characterised by relatively generic sitcom tropes - will-they-won't-they subplots, bottle episodes, and an eclectic ensemble - mixed with energetic slapstick humour and Williams' hyperactive, offbeat persona.

Its quality admittedly waned in its final years, but the enduring impact of Mork's misadventures and his heartfelt relationship with Pam Dawber's Mindy has made sure it's aged into a classic with flaws that only make it that much more endearing. That is kickstarted Williams' career is just the icing on the cake.