Weasel creates an underpants time machine which I.R. steals and use to go back in time. Weasel tries to stop him and accidentally back in time too. While traveling in time, I.R. inadvertently solves some history problems.

Weasel comes to investigate the world's largest hole, same hole I.R. tries to fill with cement.

Weasel and I.R. are sent to a correctional institute were everyone is forced to wear stupid corrective devices.

Weasel is the captain of his own commercial plane, and must take a bunch of people up a river with I.R. as his co-pilot.

Weasel and Baboon end up on a "Dessert island", an island made mostly out of sweets.

I.R. is captain of his own ship, until it bumps an iceberg and it starts sinking.

Weasel and Baboon are a pair of friendly vampires who drink only canned blood and are just looking for a fun little night on the town in Pantsylvania. But someone should try telling that to the vampire hunter Dr. Von Smellstein, who's out to get our heroes!

I.R. is jealous of his neighbor Weasel because he has a better wife, kids, job and house.

I.R. takes a driving test and Weasel is his teacher! I.R. drives through the city "Miami Vice"-style and wrecks it in progress therefore failing the test! But Weasel later finds out that I.R. was coming to get a poetic license since he made a lot of rhymes during the driving test!

The trees decide to rebel against humans after I.R. chops one.

I.R. Baboon was supposed to marry a hyena, but I.M. Weasel helps I.R. Baboon out.

A kid adopts I.M. Weasel as a pet cat and I.R. as a pet dog.

Weasel tells his story to psychiatrist Sigmund Fraud about his mishaps with I.R., at the same time I.R. is telling his own mishaps with Weasel in the room next door.