Benson to The Honeymooners

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.

George Jefferson gets help from Barney Collier from Mission Impossible

Mission: Impossible was continued 22 years later

Characters from Mission: Impossible were also featured on an episode of Here's Lucy.

Here's Lucy's Lucy was driven around Miami by Ralph Cramden of The Hooneymooner's