Readers' Poll: The 10 Best TV Spin-Offs

See what show managed to beat 'Better Call Saul,' 'Angel' and even 'The Simpsons'

2. 'Mork and Mindy'

Robin Williams' lovable alien character Mork from Ork first appeared in a 1978 episode of Happy Days where he attempted to take Richie Cunningham back to his home planet for study. (Happy Days got really weird sometimes.) The character was such a hit that he quickly got his own show, somehow jumping forward in time to present-day Boulder, Colorado. It turned Robin Williams into a superstar, but it only lasted four seasons. 

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