Two scientists want to see what the inside of a beaver is like, though instead of shrinking themselves down to size to fit inside of the beaver, they decide to make the beaver grow to fantastic heights so they can just drive their normal van around inside of him. However, Norbert is dismayed when he discovers that Daggett has been selected as the test subject, so he decides to do what he can in order to get his brother back to normal.

Episode Summary

Background Information

Production Information



  • Fantastic Voyage - The title and basic plot are homages to the 1966 science fiction film.
  • Rain Man - When Dag says "Yeh, into the pointy-weasel, that's pointy-weasel, yeh," he talks and sounds uncannily like Dustin Hoffman's autistic character Raymond in the 1988 film.


"Muscular Beaver 5"
Episodes Next:
"Blacktop Beavers"