Ten-year-old Coop Burtonburger's life takes a turn for the worse when his little sister, Millie, brings home a mysterious stray cat who, in reality, is an evil cybernetic alien in disguise. To make matters worse, neither his family nor anyone else believes him, except for his best friend, Dennis. Now, Coop risks his life every day as he attempts to foil the cat's diabolical schemes and prove to the world that the family pet is an evil mastermind.
Let the Games Begin
Coop Burtonburger has his first run in with Kat when his little sister brings the feline home.
Night of the Zombie Kat
Coop watches a horror movie, then after, Kat uses flour to make his skin white and scare Coop.
Trespassers Will Be Persecuted
Old Lady Munson lays down the law; Coop is not to set foot into her yard, but Kat makes sure he crosses the line again, again and again.
Me-Oh-Me-Oh Meow
After meowing too much, Kat is forced to wear a special collar, but in the end Kat straps the collar onto Coop's foot.
Do Not Fort Sake Me
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".
Cookie D'uh
Coop gets accused of stealing cookies.
Nip/Duck
Coop is determined to find out the truth about Kat when Kat's mysterious X-rays are destroyed.
Search and De-Toy
Coop comes up with a plan to rescue his dad's (possibly his) helicopter from Old Lady Munson.
Flu the Coop
Tensions mount when Coop is sick and Kat is none too pleased, and why shall you ask? Because germs irritate Kat's skin.
Class Act
Coop finds some magic stuff in Dad's store and uses it to do a magic act to make Kat disappear forever.
Hypnokat
Kat's new toy mouse hypnotizes the other cats in the neighborhood, and Kat seizes the opportunity to create his own cat army.
The Allergy
Coop convinces Dad that he's allergic to Kat so Dad will get rid of the pesky feline for good. Kat turns the tables on Coop, convincing Dad that he's allergic to Coop as well!
Just Me and Glue
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.
You'll Be Show Sorry
When a contest for pets is announced in Bootsville, Coop subscribes Kat because the winner wins a trip around the world. However, Coop regrets this when he realizes he will be taking the trip with Kat if he wins.
How the Test Was Won
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.
I'm Okay, You're a Kat
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!
Dial "B" For Babysitter
Coop has his work cut out for him when he's forced to babysit Kat, Old Lady Munson, and her dog Growler.
The Grass is Always Meaner
Coop comes up with a plan to make money for a Captain Blasteroid Helmet by cutting Old Lady Munson's lawn; Kat tries to stop Coop and Dennis by making the grass grow.
One Big, Happy Family
The only way to convince Dad that Coop's not the one causing all the destruction is for Coop to never leave his father's sight. But this puts Dad and Millie right in the line of fire. Coop's got to keep on his toes if he wants his family to survive.
Happy Campers
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.
U.F. Float
Bootsville's annual parade has a Spaced Out theme this year and Dad wants to advertise the House of Swap with a Flying Saucer float.
Play N'Ice
Dad builds an ice palace and rink in the backyard.
House of Scream
Kat takes advantage of Dad turning the House of Swap into a horror fun house by going for real blood.
Planter's Warp
Coop brings home a carrot suspended in a glass of water for a science project.
Curse of Tutankitty's Tomb
Egyptian artifacts at the museum turn out to be high-tech relics from Kat's world.
Pet Peeved
When Millie finds a new school friend exactly like her, she starts to ignore Kat.
Don't Give Me No Static
Desperate for a completed science project, Coop borrows one of Kat's weird machines without knowing what it does.
Storm Drained
Coop is determined to have Bootsville win against Timber Lane in a baseball game.
Fishy Frisky Business
On a family shopping trip, Kat gets Coop banned from the grocery store.
Teed Off
Dennis and Coop's fathers encourage them to revive a neighbourhood tradition, the 'round the block golf challenge.
Something Fishy In Owl Lake
The Burtonburgers face friends, neighbours, and each other in a local Fishing Derby.
Dire Education
Dad comes to school to shadow the kids on Parents' Day.
Crouching Cooper, Hidden Kat
When Kat and Millie embarrass Coop in front of the school by flipping him, he turns to Dennis for martial arts lessons.
Tom-Kat Foolery
Coop's April fool's day jokes have the entire town not believing a word he says, so how can Coop stop what seems to be a Kat led UFO invasion when even Dennis assumes it to be Coop's biggest joke yet?
In Dog We Trust
Seeing how freaked out Kat gets by a huge stray dog, Coop adopts it as his pet and bodyguard, but the dog is a lot more responsibility then he thought, especially after Coop's plan backfires, as Kat retrains it to destroy the house.
Catch My Drift
Kat overcomes his fear of snow to make sure Coop gets chilly in the Demolition Run tobogganing challenge.
Suddenly Last Slammer
The police and Old Lady Munson catch Coop and his friends waking the neighborhood.
The Kitty Vanishes
Kat struggles to perfect a teleporter to transfer Fishy Frisky Bits across space to his home.
Capture the Kat
Kat wants a day off, but Coop and the gang play capture the flag right through to his secret forest oasis.
Outer Space Case
When OLM shows an unusual interest in Coop and Dennis' favourite show, they become equally obsessed with finding out why she likes it.
Buzz Off!
It's time for the annual Bootsville Days festival celebrating the town's founding. Coop is in a real Battle of the Bugs!
Fat Kat
Kat's been eating too many treats and how he is tipping the scales with rolls of flab!
Kat Whisperer
After Coop uses cat whispering to make Kat into his new best friend, he becomes a pal to all animals.
Bend It Like Burtonburger
Coop and Dennis join the soccer team but Coop would rather show off than use teamwork.
Stall That Jazz
When Kat's listening transmitter becomes lodged in his ear, his hearing becomes super sensitive.
Under Destruction
After Kat's latest tantrum almost destroys the house, Dad starts his own extreme renovation.
Beware the Were-Coop
After Kat scratches Coop, he believes that he's turning into a were-cat.
Trick or Threat
On Halloween, Coop and Dennis plan on trick or treating... much to Kat's dismay.
Hack Kattack
Kat uses a universal remote control to try and hack into Earth's computer systems.
It's a Rocket, Man
Both Coop and Kat join a local rocket club and Coop becomes a big star. Unfortunately, Kat plans on using Coop's rocket to destroy a satellite in space.
Kid vs. Kat vs. Christmas (1)
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.
