Kat builds a Rat-ray gun, which he plans on using to turn Coop into a rat, but Dad gets zapped instead, so Coop hopes he can change Dad back... If he can catch him first!

After taking the fall for one too many of Kat's destructive escapades, Coop decides to let Kat have free rein to cause whatever destruction he wants.

Kat's swarm of flea-sized mind control robots hop into the ears of the people of Bootsville and soon they all destroy Coop.

After meowing too much, Kat is forced to wear a special collar, but in the end Kat straps the collar onto Coop's foot.

Coop comes up with a plan to rescue his dad's (possibly his) helicopter from Old Lady Munson.

As Coop prepares for a big test, Kat comes up with multiple ways to distract him from studying, which in the end, Kat ironically helps Coop remember the things he should study thus having a B+ on the test.

Coop Burtonburger has his first run in with Kat when his little sister brings the feline home.

Coop gets accused of stealing cookies.

Coop falls for Old Lady Munson’s niece Fiona, and Kat does everything he can to make Coop look bad.

Dennis is accidentally knocked into a portal around the world.

Coop finds some magic stuff in Dad's store and uses it to do a magic act to make Kat disappear forever.

When Millie tickles Mr. Kat's 'tickle spot' he goes into a blissful state that renders him useless as an alien agent and when Kat's empire find out about him they send a robot to destroy Millie.

Coop becomes Dennis’ wing-man for a change, as they go in search of the 'sewer-croc-baby'.

Coop is determined to find out the truth about Kat when Kat's mysterious X-rays are destroyed.

Tensions mount when Coop is sick and Kat is none too pleased, and why shall you ask? Because germs irritate Kat's skin.

Kat's new toy mouse hypnotizes the other cats in the neighborhood, and Kat seizes the opportunity to create his own cat army.

When Coop and Kat get glued hand to paw, they are forced to spend the day together. Kat turns out to be a big help in putting together Coop's new Mechanizor Warrior model robot until Coop realizes Kat has programmed it to destroy Coop, but Kat will also be destroyed.

Coop discovers a self-help motivational tape in the House of Swap and turns his life around, until Kat uses the tape to remove Coop’s new-found power of perfect positivity. Now it's up to Coop to use the tapes to fight evil Kat with an even more evil Coop!

When Kat uses his growth ray to bury Bootsville in a catnip jungle, Coop is blamed by the irate Bootsville Gardening Club.

With Coop out of town, Kat wants to turn water into milk and Dennis comes to the rescue.

Millie brings home the class hamster, unaware that Mr. Kat hates hamsters.

Coop tries to stop the destruction of Massive Mart.

Coop, Millie, and Dad are taken away to a top secret base to be interrogated, after a UFO investigator suspects they are aliens.

Kat’s devious magnifier satellite is causing a dangerous heat wave in Bootsville.

Kat's malfunctioning spybot thinks Coop is its new master, and wants to protect him from Kat.