Green Acres and Lassie
"The Wish" (Season 5, Episode 2) has two semi-regulars from Green Acres involved with Timmy and a horse "Star."
Kay Kuter is one of two men who runs a pony ride setup. He was Newt Kiley on Green Acres. G.A.'s Roy Trendle, appears later, not with Kay, as the Calverton sheriff.
I don't have a point to make, just thought the two men on a single episode of a show other than Green Acres was interesting.