Silver Spoons to The Beverly Hillbillies

Diff'rent Strokes' Arnold did a story for his school newspaper on Silver Spoons' Ricky.

Hello Larry's Larry Alder crossed over onto Diff'rent Strokes for 3 different 2-part episodes

Hello Larry's characters were mentioned 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