I remember one day hearing my father downstairs laughing his ass off. Went down to see what was so funny to find he had just discovered Mystery Science Theater 3000, and was losing it watching The Giant Gila Monster. I sat down to watch. I didn’t really get it then, but I’ve been a fan ever since.
Overall favorite is probably The Movie if that counts (not an episode), Werewolf if it doesn’t.
Removed by mod
Me and my mum found the movie on late one night and I don’t think we’d ever laughed as hard from something for as long. Our sides were in agony.