Seven!
Over a span of 15 years, there were actually seven different spin-off shows which stemmed from All in the Family. Seven! Including Maude, The Jeffersons, Gloria, Archie Bunker’s Place, and 704 Hauser.
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Flush
Turns out that back then toilets on television were completely taboo. However All in the Family was all about breaking the norm and they became the first network TV show to air (wait for it) the sound of a toilet flushing. OH.