Make Room For Granddaddy to Mister Ed

Make Room for Grandaddy's Williams had Here's Lucy's Lucy Carter as a houseguest

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