General Hospital: Night Shift to Green Acres

spin off of General Hospital

The series finale of Harry's Law featured Picket Fences? Doctor Carter Peck as an assisting medical examiner

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 Mary Jane Lewis was originally a character on The Lucy Show (also called The Lucille Ball Show).

Mr. Mooney from The Lucy Show was on Hi Honey, I'm Home!

Hi Honey, I'm Home!'s Lloyd was friends with Mister Ed

The Beverly Hillibillies? Granny appeared on an episode of Mister Ed (see below for more on The Beverly

Petticoat Junction was a spin-off of The Beverly Hillbillies. Petticoat Junction spun off Green Acres. All three shows crossed over numerous times.