I thought I'd try something low-maintenance. We begin with...
"What a Night for a Knight"
Scooby-Doo and the gang investigate the mysterious Black Knight, who turns out to be Mister Wickles the curator, who is running an art forgery ring.
Overall: An OK episode. Not much of a mystery, even by cartoon standards. Mister Wickles is the only possible suspect.
"The Spooky Fog"
Featuring: Don Knotts
Would A Kid Back Then have Known Who They Were?: See above.
The gang meet Don again, this time working as a deputy in the town of Juneberry, seconding Sheriff Dandy Griffith. They encounter a Skeleton Man, who is actually local rancher Gene Halltree, who is rustling cattle.
Overall: The best I can say is that this was slightly better than the last one.
"Scooby-Doo Meets Laurel and Hardy"
Would A Kid Back Then have Known Who They Were?: Possibly. I'm pretty sure that I didn't know much about them when I first saw this, but I believe I had heard their names.
The gang is going to a ski lodge in Vermont. Along the way, they encounter Stan and Ollie, who are seeking work as bellhops at the lodge. They all run into the Ghost of Bigfoot, who turns out to be Mr. Crabtree, leader of a group of car thieves.
Overall: An OK episode.
I think at that point Laurel and Hardy were still well enough known. I knew them then from their "Babes in Toyland" movie.
I knew about Laurel and Hardy back then. Both of my parents experienced the Depression, and my father in particular tried to impart some of his tastes on his children. Additionally, they frequently showed up in Looney Tunes cartoons, either as funny animals or in those cartoons with lots of celebrity caricatures. Also, you still sometimes saw movies and shorts on local television.