Benson to Mister Ed

Soap's Benson DuBois spunoff on to his own show, Benson

Maggie Gallagher from Hanging In crossed over onto Soap

Hanging In (and Maude's) Maggie Gallagher crossed over onto Soap for 10 episode

The first All in the Family spinoff character was Maude. Maude was Edith Bunker's cousin.

The Jeffersons' George Jefferson was the second All in the Family supporting character to spinoff onto his own show.

The Jeffersons family appeared on the final episode of Fresh Prince where they purchased the house from the Banks family.

Diff'rent Strokes' Arnold and Mr. Drummond considered buying the home of The Fresh Prince of Bel Air's Banks family.

Hello Larry's Larry Alder crossed over onto Diff'rent Strokes for 3 different 2-part episodes

Hello Larry's characters were mentioned on Hi Honey, I'm Home!.

Hi Honey, I'm Home!'s Lloyd was friends with Mister Ed