Call Mr. 'D' to Our Private World

In syndication early episodes of Richard Diamond, Private Detective were called Call Mr. 'D''

Richard Diamond, Private Detective's Sam reprise her role on an episode of The Dick Van Dyke Show.

Sally Rogers from The Dick Van Dyke Show was on Hi Honey, I'm Home!

Alice & Trixie from The Honeymooners crossed over onto Hi Honey, I'm Home!

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

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 have characters that have flown on the fictional Trans Global Airlines

The Young and the Restless has had numerous crossovers with As The World Turns

spin off of As The World Turns