The Bob Cummings Show to The Many Loves of Dobie Gillis

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!

Many Loves of Dobie Gillis' title character crossed over onto Hi Honey, I'm Home!