Hazel to Silver Spoons

Hi Honey, I'm Home!'s Honey had a phone conversation with Hazel's title characte

Hello Larry's characters were mentioned on Hi Honey, I'm Home!.

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

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