Both Weasel and I.R. end up in hospital after a collision course. However, a slight mix-up in the operation room leads to both having the other’s brain. This episode was originally meant to be the series finale, but the show was renewed for a second season.

Whilst in prison, Weasel explains his crime when he stalked I.R. Baboon as a subject for a wildlife study, which turns out to all be a bad weasel dream that Cow had.

Weasel and I.R. are sent back to repeat the 4th Grade, in which they would go to the same school as Cow and Chicken.

Weasel creates a device that controls peoples’ sleeping patterns, and decides to use it in order to help give the public their ability to dream again.

I.R. is running a failing plant stall and attempts to do a better job by selling a rare thistle from a nearby plant museum.

Doctors Weasel and I.R. shrink themselves in order to perform an operation, which is to repair a crack in The Red Guy’s butt cheek.

Based on the story of Frankenstein, Weasel is a mad scientist, whereas I.R. is his assistant.

A narrator tells the story about the travelling country-singing duo of Weasel and Baboon.

In an attempt to prove his claim that he’s a better musician than Weasel, I.R. gatecrashes a live event, armed with a theremin.

Based on the true story of The Wright Brothers, The Red Guy narrates a documentary about The Wright Bros. and the Rong Bros. (Weasel and I.R.), competing to see who could invent the first plane.

Based on Cinderella, Cinder-Weasel tries to make it to the evening ball, despite the interference of his evil stepbrother, I.R. Baboon. He relies on the help from his fairy godfather (the Red Guy).

Lance Sackless (The Red Guy) creates his own athletic games, with Weasel and I.R. as his only contestants.

With help from the Red Guy, Cow manages to fish Weasel out of her TV and into her home, leaving it up to I.R. to find him.

I.R.’s Christmas celebrations go wrong when his family are thawed out at Weasel’s pent-house.

Back in the medieval times, Weasel is a dentist with wizardry powers with Baboon as his envious nurse.

Weasel attends I.R.’s wedding, only to find that the bride hasn’t shown up yet.

Weasel and I.R. battle each other as gladiators in the Roman times.

After tripping over an invisible pot-hole, I.R. breaks his “phantom foot”. Ultimately, he attempts to sue Weasel over his injury.

Weasel and I.R. (now both senior citizens) look back upon their memories.

Weasel and I.R. (as senior citizens) tell their grandchildren about their ancestors’ involvement in the War of Independence.

It’s the Middle Ages, and Weasel and I.R. are looking for a dragon to slay.

Weasel and I.R. are called in as replacement kids after a couple’s real children go away to camp.

I.R. Baboon takes the role of Robin Hood, with Weasel being his ally, Little John.

A poetic I.R. attempts to get a driving license, with Weasel being his instructor.