Dad competes with Dennis' father as to who's the best camper during a family weekend in the woods. Coop and Dennis use their knowledge of the forest to lead Kat into escalating confrontations with nature.

The daily battle between Coop and Kat end up in the bathtub and the fight continues ending in the bathroom flood of floods.

Coop and Dennis build a tree fort, where Kat used it to power-up his collar because the tree's fort was very tall, so Kat's climbed it and starting communicating with other "Kats".

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

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.

Lorne and Harley are filming a 'Catboy Update' film and allow Kat to take possion of a leaf-blower and it's a fight to the finish into Old Lady Munson's yard.

Coop's at the denist's office where Kat distracts the denist and trys some surgery of his own. Coop frees himself and the fight is on with the office being the loosing end.

Back to School shopping with the family and Kat finds a chance to make things really ruff for Coop who's found a toy he really wants.

On a family shopping trip, Kat gets Coop banned from the grocery store.

Dennis and Coop's fathers encourage them to revive a neighbourhood tradition, the 'round the block golf challenge.

Kat overcomes his fear of snow to make sure Coop gets chilly in the Demolition Run tobogganing challenge.

The police and Old Lady Munson catch Coop and his friends waking the neighborhood.

When OLM shows an unusual interest in Coop and Dennis' favourite show, they become equally obsessed with finding out why she likes it.

Coop and Dennis join the soccer team but Coop would rather show off than use teamwork.

After Kat's latest tantrum almost destroys the house, Dad starts his own extreme renovation.

Coop hits a ball into Phoebe's house and has to retrieve it. He's followed in by Kat who at first trys to mess things up for Coop but has problems of his own by the name of Honeyfluff.

Kat gets a taste and the new and improved Fishy Frisky Bits Cat Food and seems to enjoy it a bit too much.

Kat's napping is interruped by a little bumblebee and the fight is on.

Coop begins working on his paddleball record and finally annoys Kat who begins to try and wreck his plans.

Coop and Dennis are at the movie theatre enjoying a 3D movie. Kat plants a cell phone on Coop and calls it bothering the entire theatre. Coop heads for the lobby to clean up where Kat starts the attack. In the end there's a real-to-life looking 3D fight on-stage.

Coop's family dinner out at the local pasta place is interrupted by Kat who has been smuggled in by Millie and the fight is on.

Cat subsitutes Coop's soccer ball for one with a built-in time bomb. Coop and Dennis run off trying to find a place to drop the ball to explode. No matter where they go they keep finding reasons the ball can't go there. Kicking the ball between them in panic, the ball winds up next to Kat. And the exploding ball scores!

A day at the pool finds Kat placing some super-bouncing gook on the diving board as Coop prepares to dazzle his friend with a really high dive that ends of leaving Old Lady Munson without her favorite soap-opera and Kat high-and-wet.

Hockey Practice is interrupted by a classic Coop vs Kat on the ice

Kat uses a universal remote control to try and hack into Earth's computer systems.

Coop's hopes of a normal Christmas are shattered by the fact that Kat is constantly getting him in trouble; it is revealed that Kat really misses his family back at his home planet. Coop and Millie's grandparents are expected to visit for the Christmas, but many troubles cause them to be late.

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Growler swallows a Kat device which makes him grow to the size of a T-Rex.

Coop takes on the teen aged bully who pedals the Curly Swirl Ice Cream cart, and forgets to pay attention to Kat's latest evil plans.

Kat thinks the haunted LeBoot Mansion will be the perfect place for an inter-space teleporter.