One Life to Live to The Jackie Gleason Show

All My Children and One Life to Live crossed over a number of times

All My Children and Loving feature the fictional Trans Global Airlines

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

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

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

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

The Honeymooners Ralph Cramden (and others from the show) were featured in segments of The Jackie Gleason Show