Advertisements And by series, I mean plural. What TV show, along with its spin offs, had the most years on TV? I would think it would be between Law & Order, which spun off SVU, Criminal Intent, and trial by Jury. Spoiler (17+9+7+1=34) Or it could be Happy Days, which spun off Mork & Mindy, Laverne & Shirley, and Joanie loves Chachi. Spoiler (11+5+8+2=26) But what about All in the Family, which gave us the Jeffersons, Maude, Archie Bunker's Place Spoiler ( 9+10+7+5=32 years) What are some other long time TV shows and spin offs?