Promised Land to The Bill Dana Show

Promised Land's Russell Greene helped his boss Ryan Matthews face his families past, then Ryan crossed-over onto Diagnosis Murder to ID the body of one of his ex-wife's old friends

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

Make Room For Daddy was continued as Make Room For Grandaddy

The Danny Thomas Show was originally called Make Room For Daddy (and in syndication all episodes are called