One Life to Live to The Joey Bishop 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.

Make Room for Grandaddy's Williams had Here's Lucy's Lucy Carter as a houseguest

The Danny Thomas Show came back as Make Room For Granddaddy

The Danny Thomas Show spun off The Joey Bishop Show and Barney Fife from The Andy Griffith Show crossed over onto The Joey Bishop Show