Jeff Goldblum as an Indiana Jones-esque adventurer?
Yes, it's true - the story portion of the Feb 20, 1990 episode of Sesame Street
features Jeff Goldblum as Minneapolis Johnson, brother of Sesame's Bob, and his quest for the Golden Cabbage of Snuffertiti.
It's... uh... quite a thing.
Surprised this wasn't mentioned prior, apologies if my search fu was weak today.