Cat decides he wants some quiet time to himself, so Dog puts on "the suit" and Cat finds out just how much he really misses Dog. He tries his hardest to read, write, or eat, but he feels so guilty that he makes Dog come out.

In a filler segment, since the pilot was too short, CatDog read their fan mail, but since Winslow claims there is no mail for them, Dog makes up a wild version of their origin story.

CatDog want to eat at a taco restaurant, but Rancid Rabbit bans them from entering. They try sneaking in numerous ways, but are caught every time. Eventually, Dunglap takes control of Taco Depot, and lets CatDog eat there whenever they want.

CatDog get fleas, so they have to wear an unfashonable belt. Dog refuses to wear the belt. When he does, the fleas inhabbit Cat, so they fight over the belt. When the belt becomes useless, they find the fleas a new home.

CatDog become famious stars with ""CatDog Food"". But after the fame gos to Cat's head, he gets cocky, and insults Dog. He even gains a bunch of weight. It isn't until He makes fun of Rancid Rabbit, and ruins the deal that he relizes that he has made a change for the worst.

CatDog try to go on a vacation, but they nd up in the middle of a giant traffic jam that never stops. After they make the best of it, they turn on each other when they need food. Eventually, they make peace and try to get out. They end up on a bulletin board, and think they're on an island.

Cat saves Lube's life from a tick, so Lube promises to serve Cat always. But when he starts to keep Dog away, Cat realizes that he needs to rid himself of Lube. So, Cat and the Greasers make a plan where The Greasers pound Cat.

Cat tries to get Shriek and Dog married so the Greasers will stop pounding him. Then, he dreams about there life together, and sees how bad it would be. When he wakes up, the beginning of his dream comes into play, he makes Dog say bad things about her. The catch? Dog says that the insults were from Cat.

CatDog work in Rancid's factory for ""Kravity Crunch"" cereal. Dog works harder than anyone else, and gets promoted to Prize-Stuffer. Cat, and the others at the factory are mistreated. But when Dog is promoted to #1 prize stuffer, the workers revolt, and Cat and Dog reunuite just to become a prize.

CatDog become greedy when the realize a Gopher has a lot of diamonds underground. Eventually, the rich makes them greedy, and forget that there brothers. At the end our hero's find out that the diamonds were really just rock candy.

The Pet-CatDog find a hurt Roach in the dump, and Dog wants to keep the Roach as a pet. Cat trys to get rid of until he's fed up with 'Roachy' the roach, and purchases a machine to annihilate it. When the Roach saves Cat's life, he realizes how wrong he was to stereo-type it.

Cat invites people to his party, except for Winslow, that is, so Winslow throws his own party, which turns out to be more fun than Cat's party. So, Cat keps Mervus and Dunglap Tied up, and forces them to have fun. Then, when Dog joins the party, and Mrevis, with Dunglap escape, Cat enters the party, and everyone leaves.

Cat enters Dog in a sledding contest to win big money. He trains Dog in a winter version of their house. Whjen the race comes around, Dog races half way through it, and gets hypothermia. Cat feels bad and does the rest of the race himself, just for the Greasers to win.

Cat is nervous because his Swedish Pen Pal Ingrid is in town.

Dog meets up with a paperboy faster than him. This agravates him, and he trys everyday to get faster. When he realizes that he won't ever be, the former mailmen make a disgrase of him. Then...he relizes that the mailman is a person who has been faster since childhood, and he goes faster than him.

Cat is tired of the Greasers beating him up. So, when he sees an add in a magizine for drinks that will pumpyou up, he buys them. He dosn't like the taste, but Dog loves it. So he gets Dog pumped up, and he relizes at the last minute that Dog has snapped. He tries to get more than revenge on the Greasers, and Cat tells him 'You're not really like this.

CatDog go to the store, and Dog buys ""Little Cat."" Dog pays more attention to Little Cat, and Cat trys not to mind. But when he relizes he is not wanted, he leaves, and trys to hitch hike a ride somewhere. Dog relizes how dumb Little Cat is, and makes up with Cat.

The Greasers plan another attack on Catdog, when Eddie the Squirrel messes them up. It turns out that Cliff has been glued to Eddie. He's then fired from the Greasers, and they go to CatDog for help. They graduate from CatDog's 'Freak' School. When Cliff realizes that Eddie's only on his Jacket, he beats up CatDog, and Eddie.

It is almost Brother's Day in Nearburg. Everyone is getting ready for it, except CatDog. Dog has gone out and bought a mud wrestling ting, and Cat... well he's just greedy. So when it comes down to it... Cat sells his lufa (a cats most prized possestion) to get money. Dog sells his Mud Wrestling stuff. They both bought eachother Wrestling masks, and the episode ends with the two of them attacking Winslow.

Cat collects every ""Mean Bob"" toy even if it means selling everything they own, while Dog plays with his one Mean Bob.

It's the Full-Moon, again, bringing out Dog's wolf-like instincts.

It's CatDog's family reunion, and they fight over a trophy.

Cat wants to be alone, and wants a new butt instead of having Dog attached on him.

CatDog are fed up with getting hurt by the Greasers, so they try to find out how to fight back.

Dog moves out after a bet with Cat, saying that Dog cannot last a day alone without him.