The Bob Cummings Show to The Cosby Show

Here's Lucy's Lucy Carter was visited in two episodes by The Bob Cummings Show's Bob Collins.

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 Honey and Lloyd discussed The Cosby Show's Huxtables.