Love That Bob to The D.A.

The Bob Cummings Show was repackaged and ran in syndication as Love that Bob.

Here's Lucy's Lucy Carter was visited in two episodes by The Bob Cummings Show's Bob Collins.

Here's Lucy's Lucy Carter and Mannix's Mannix are held hostage in an episode of Here's Lucy.

Mannix returned to TV on an episode of Diagnosis Murder to solve an old unsolved case with the help of Dr Mark Sloan.

Diagnosis Murder's Dr Mark Sloan was defended by Matlock when Sloan was accused of murder

Both feature the fictional Trans Global Airlines

Emergency! had a crossover with Adam-12 to find a boy who ran away from the hospital.

Adam-12 had a two part crossover with The D.A.