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: Zombie cats invade the Burtonburger household after Coop watches a scary movie.
Trespassers Will Be Persecuted: When Old Lady Munson forbides Coop from stepping on her lawn, Kat makes sure that he does, in fact, get in trouble. Me-Oh-Me-Oh Meow: Kat is forced to wear a special collar after constantly meowing.
Do Not Fort Sake Me: Kat takes over Dennis and Coop's newly built tree fort. Cookie D'uh: Coop is accused of stealing Millie's Greenie Girl 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 helicopters from Old Lady Munson.
Flu the Coop: Tensions mount when Coop is forced to stay home from school and Kat is none too pleased. Class Act: Coop uses a magic trick to make Kat disappear forever.
Hypno Kat: One of Kat's toys causes every cat in town to become hypnotized. The Allergy: Coop comes up with the perfect plan to get Kat out of the house. He convinces Dad that his intense allergy to Kat has become too much to handle.
Just Me and Glue: Chaos ensues when Coop and Kat's hands are accidentally glued together. You'll Be Show Sorry: There's only one reason that Coop and Kat would team up to compete in a local cat show: a year's supply of cat food.
How the Test Was Won: As Coop prepares for a big test, Kat comes up with multiple ways to distract him from studying. I'm Okay, You're a Kat: A self help tape switches up the personalities of Coop and Kat.
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 an action figure: cutting Old Lady Munson's lawn.
One Big Happy Family: To prove that Kat's the source of all his problems, Coop decides to spend every moment with his Dad. Happy Campers: Coop and Dennis' families compete in a camping challenge.
U.F. Float: The gang creates a life-sized U.F.O. float for a local parade. Play N'Ice: A backyard ice rink causes problems for Kat.
House of Scream: Dad turns a house into a haunted house, and Kat uses this as the perfect opportunity to take out Coop. Planter's Warp: Kat turns all of the plants in the house into gigantic and deadly creatures.
Curse of Tutankitty's Tomb: Coop believes that an Egyptian tomb is actually a spaceship that belongs to Kat. Pet Peeved: When Millie's attention is diverted, Coop seizes the opportunity to get Kat out of the house.
Don't Give Me No Static: Coop borrows one of Kat's experiments for a science project. Unfortunately, things backfire in a big way. Storm Drained: Kat's weather changing machine could interupt Bootsville's annual baseball game with their rivals, Timber Lake.
Fishy Frisky Business: Coop is unable to stop Kat's newest diabolical plot when he is banned from the grocery store. Teed Off: Coop and Dennis revive a neighborhood tradition: a golf challenge.
Something Fishy In Owl Lake: The whole neighborhood is caught up in a fishing competition. Dire Education: Millie takes Kat in for Show and Tell day, much to Kat's disdain.
Crouching Cooper, Hidden Kat: Coop takes karate lessons to show off his skills at school. Tom Kat Foolery: On April Fool's Day, Coop's lies catch up with him when no one believes anything he says.
In Dog We Trust: Coop brings a stray dog into the house to directly compete with Kat. Catch My Drift: Kat develops a sudden love for snow, and it's just in time for Coop's tobogganing competition.
Suddenly Last Slammer: When the police question everyone about a late night rumbling, their stories are all mismatched. The Kitty Vanishes: Kat discovers that his teleporter can transport people, and madness ensues.
Capture the Kat: A game of capture the flag turns nasty when a host of Kat's secret forest traps get involved. Outer Space Case: Old Lady Munson develops a suddent interest in a hot new tv show, and Coop wants to know why.
Buzz Off!: Kat accidentally turns the town's mosquitoes into giant bugs. Fat Kat: When Kat gains a lot of weight, Coop takes advantage of the situation.
Kat Whisperer: Coop learns a new skill that causes him and Kat to become fast friends. Now, he's making friends with all of the neighborhood cats. Bend It Like Burtonburger: After joining the soccer team, Coop begins showing off. But when he needs Dennis' help, will Coop be able to keep his ego in check?
Stall That Jazz: When Kat's hearing is accidentally enhanced, Coop goes out of his way to create lots of noise. Under Destruction: After Kat destroys the house, Dad begins doing extreme renovations.
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.
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.
Something About Fiona: Coop falls for Old Lady Munson’s niece Fiona, and Kat does everything he can to make Coop look bad. Tickled Pink: 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.
Flea Brains: Kat's swarm of flea-sized mind control robots hop into the ears of the people of Bootsville and soon they all want to destroy Coop. Menace the Dennis: With Coop out of town, Kat wants to turn water into milk and Dennis comes to the rescue.
Cheeks of Evil: Millie brings home the class hamster, unaware that Mr. Kat hates hamsters. Reap it and Weep: When Kat uses his growth ray to bury Bootsville in a catnip jungle, Coop is blamed by the irate Bootsville Gardening Club.
Blasteroid Blues: Coop tries to stop the destruction of Massive Mart. Rat-a-Phooey: Kat's Rat-ray gun turns Dad into a rat, and Coop hopes he can change him back... If he can catch him first!
Trash Talking: Millie tosses Kat's spacious scratching post lair, and Kat tries to get it back. Over the Radar: Coop, Millie, and Dad are taken away to a top secret base to be interrogated, after a UFO investigator suspects they are aliens.
Nuff Said: Coop decides to let Kat have free rein to cause whatever destruction he wants. Rhymes With Coop: Due to an ‘over-loading’ problem on the Kat Nebula, Kat plots to turn Bootsville Beach into a giant litter box.
Bringin' the Heat: Kat’s devious magnifier satellite is causing a dangerous heat wave in Bootsville. The Three Aarghs: Coop and Dennis compete with one another to reduce their carbon footprints.
Kat to the Future Part 1: Coop uses Kat’s time machine to go back to the past and stop Millie from bringing Kat home, but ends up altering the future for the worse. Kat to the Future Part 2: Coop tries to undo the Kat invasion, which he brought about by fooling with Kat’s time machine. How will Coop undo the Kat invasion, and get back to the present before it's too late?
Down the Drain: Coop becomes Dennis’ wing-man for a change, as they go in search of the ‘sewer-croc-baby’. 9 to 5 to Oblivion: Coop breaks every window in Dennis’ house, and is forced to work off his debt by working in Henry’s store.
When Bad Dogs Go Big: Growler swallows a Kat device which makes him grow to the size of a T-Rex. The Bottyguard: Kat’s malfunctioning spybot thinks Coop is its new master, and wants to protect him from Kat.
Rebel with a Claw: The Kat Kommander’s rebellious son runs away to Earth, where he becomes a handful for Kat, and a danger to the human race. Swap Wrecked: Dad accidentally swaps an assortment of Kat’s weapons to the unwitting residents of Bootsville.
Hit the Road: Kat is left at a kennel while the Burtonburgers go on vacation. Never Cry Sheep: Kat becomes obsessed with making the biggest yarn ball ever made, and starts rustling sheep to gather their wool.
Kickin Butler: Dennis is accidentally knocked into a portal around the world. You Kat See Me: Kat makes himself invisible and causes trouble for Coop on the night he invites Fiona to dinner and when Dad invites Coop's teacher over for dinner.
Keep on Rockin: Coop's grandparents visit, so Dad buys them rocking chairs. However, it turns out they are adventure junkies who accept that Kat is an alien. It's in the Bag: Coop searches for the last available bag of the feline's favourite food after the factory that makes it closes down so he can taunt Kat.
King of the Pipsqueaks: Old Lady Munson's garden gnomes come to life and mistake Coop as their leader. Down the Creek: Old Lady Munson tells Millie creative stories about her adventures in the past.
Turn the Other Cheeks: The evil alien hamster Mr. Cheeks comes back to get revenge on his nemesis, Kat. Birthday Bashed: Dad organized a surprise birthday party for Coop, and Fiona comes to his birthday, but Phoebe will do anything to get rid of Fiona. Meanwhile, Kat is trying to enjoy a virtual picnic with his girlfriend, but the kids and Coop keep crashing Coop's birthday.
Mind Games: Dad orders Coop to spend more quality time with his little sister; Kat builds a telepathy helmet. Strange Kat on a Train: Coop goes on a train to buy something from a man named Old Herman, Unfortunately it turns out to be the evil alien hamster, Mr. Cheeks!
Board Kat: Coop and Kat fight over the animal's new lightning box generator and end up swapping brains. The Treasure of Sierra Munson: Coop discovers buried treasure under Old Lady Munson's house. Note: YTV aired this episode as a mistake as it was originally supposed to air on March 5, 2011.
Fangs for the Memories: Kat’s memory eraser leads to Coop forgetting Kat is an evil alien, but Dad accidentally gets Coop’s lost memories and suddenly knows the terrible truth. Drive-In Me Crazy: Kat builds a device that brings an assortment of movie monsters to life.
Hair Brains: Kat coughs up a trio of living hairballs, and he orders them to attack Coop Hot Dog Day: It’s Hot Dog Day, and Coop has the honor of being named Keeper of the Weiner Water. But Kat wants to ruin the most special day of the year.
Amazing Feet of Strength: Kat soups up Coop’s new soccer shoes to allow the wearer to run faster and jump higher, and Coop wears the shoes in the championship game. Me Coop, You Kat: Kat turns Coop into a cave man, hoping his lowered I.Q. will make him easier to outsmart.
You Scream, I Scream: 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. Good Luck Harm: Kat makes himself a high-powered good luck charm, which means bad luck for Coop.
Bootsville's Most Wanted: Buck Diamond, Animal Protection Officer declares Coop `Bootsville's Most Wanted.' Kat of Diamonds: Coop and Fiona have to settle their argument before they can work together to stop Kat in his evil tracks.
Coop D'Etat: Kat and Old Lady Munson show up at school to torment Coop; Kat wants to steal the satellite from Bootsville's Museum, but Coop must stop Kat from stealing the satellite. The Incredible Shrinking Coop: Kat shrinks Coop and Dennis down to size and tries to squash them like bugs, which makes it hard for Coop to do something big for Dad for Father's Day.
Who's Haunting Who?: Kat thinks the haunted LeBoot Mansion will be the perfect place for an inter-space teleporter. It's All in Your Head: Kat controls the mind of Agent Napolitan, but his plan goes down when some squirrels attack him.
The Kat Went Back Part 1: When Kat is fired for incompetence the Robo-Kat-Kops that are sent to take him home also capture Coop, Dennis, Fiona, Millie, Lorne, and Harley and take them to the Kat Planet. The Kat Went Back Part 2: Coop and the rest of the kids need Kat's help to escape Kat Planet. Will he give it?
The daily battle between Coop and Kat end up in the bathtub and the fight continues ending in the bathroom flood of floods.
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.
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 tries to attack some birds in a feeder and a squirrell scares them off. Kat knocks the squirrell off the feeder and drop-kicks it out of the yard. A short time later Kat's being hit by an acorn everywhere he goes. A chase of a squirrel winds up back in the yard and Kat learns that squirrels stick together.
Dad offers Coop a chance at a passage to manhood. Kat finds that this does not meat his approval and a fight is on. Can Coop pass the mustard?
Lorne and Harley oversleep and miss the school bus and have quite the adventure catching up to it only to find out that it's Saturday.
Lorne and Harley rock out with a 'Catboy' music video featuring the battles between Coop and Kat.
As Kat joins a bunch of wailing cats, Coop mistakes it for a signal of an alien invasion and sets out to wake up the entire town in alarm. It's a musical interruption at the end by Old Lady Munson that really alarms the citizens.
Millie heads for the nursing home with Coop and Kat with the idea that Kat can be a companion cat. Kat seems to be taking it well until Coop tries to break it up and head for home, and the house-raising battle begins.
Coop discovers that Kat has shed his skin, leaving catnipian termites, after broken by Coop.
Coop goes into Kat's brain to mess with Kat's dreams to make them his worst nightmare, but it's a big nightmare for Coop.
As Millie and Phoebe play make over, Kat begins using a laser pointer in his finger to tease Honeyfluff and uses that to begin a fight with Coop. It's Kid vs Kat vs Cat.
A trip to the zoo has Kat trying to make time with a lady lion only to have the King of the Beast set off a fight beween the other animals and Kat with Kat taking the loosing end all the way.
Family picture day has Millie and Dad dropping off Kat at the groomers. Kat does not take to being groomed. After finishing off the groomers, it's between Coop and Kat with Dad and Millie walking into the middle of the fight with the result being a hair-raising picture.
A dog chases Kat up a tree and Millie sends out an alarm that Kat is stuck in the tree. When Kat does not want to come down, not the fire department, a SWAT team or the Army can get him out of that tree, but Coop knows the way.
Coop makes a Kat-Proof-Suit out of an old washing machine. It seems to work until Kat breaks out the old steam roller.
When Kat is not trying to destroy Coop, or build some new-fangled device, he's working on his new dance, the Frisky Kitty.
