I was sad to hear of Don Adams' death. I used to watch "Get Smart" with my dad every Saturday night when it was new. (Later, in 1969, it moved to Fridays and conflicted with "The High Chaparral," which became a problem for my dad. Nothing like the internet for archaeology on your own life.)
But anyway, I found a bit of trivia reading the Don Adams listing at the Internet Movie Database.
Apparently in 1982 he played a character named Sidney Williams on an episode of The Love Boat.
Sorry I missed that at the time. That would have fun to know, as it is now.