Ralph is alerted by the secret headquarters that a strange epidemic of people hating their dogs is spreading around, and he seeks the help of French poodle, Agent Noodle, the master of fuzzy logic. Once Agent Noodle discovers that the epidemic is being spread by a strange chemical in the human snack foods, Ralph, Noodle, and Mitzy travel to Angus' Labratory, where Ralph undergoes scrupulous training to go undercover as a cat at the Notneb Kitty-Litter Factory, where there's been rumors of cats roaming around. While there, Ralph discovers that the cats are putting the chemical, K-9, in the snack foods, and is joined by Mitzy and other spy dogs to defeat the cats.

It all starts when Ralph suddenly notices a pattern in the mail that his owners are receiving: everything is a "You've won ten million dollars!" mailer. He also notices a strange slime on the envelopes, and sends the data off to the secret headquarters. He then receives word that the slime is from the evil Space

It all starts when the flea nation steals a truck load of the government's hair growth chemical. Ralph is contacted about the missing chemical. He then, using his high tech TV, finds that the fleas are aboard a blimp floating above the local baseball stadium during the big game. So Ralph, with the help of Scribble, Mitzy, Frank, and Angus' floppy foam hats, have to put a stop to the fleas evil plans of making the dirty, long haired, nail biting fans in to big fuffy balls of perfect living conditions for the fleas.

All dogs are supposed to take pictures of their owners homework to send in for examination in case of any harmful formulas or equations. Von Rabie missed sending his little Shiela's homework because she got in trouble for lying. After being contacted, Von Rabie sends in the homework pictures. But then it is discovered that Shiela made a formula that would help restaurants serve the correct amount of food to each individual person.

Someone is stealing the worlds supply of beef. Which means that all the dogs are having to eat veggies! Apparently the baddie is hypnotizing the cows with radioactive cud. So it's up to Ralph and the crew to dispose of the cruddy cud.

Another day is passing by slowly. So Ralph decides to tell Scribble a story about how the Spy Dogs once saved the world from a storm of asteroids. But before Ralph can explain how it was done, the disaster repeats itself. So Scribble gets to experience how it was done first hand. It's an amazing feat as the Spy Dogs save the world yet again!

Earnest Anyway's finally caught the Abominable Snowman, and now he's after the poor Loch Ness monster! When the Spy Dogs hear of this, Ralph is alerted immediately, and goes off to Scotland, where he meets up with fellow Spy Dog, Erin (*sigh*, as Ralph would say), and Erin then proceeds to tell him the true story behind the Loch Ness monster. As soon as she finishes though, Ernest is hot on their tail, and it's up to Ralph and Erin to save poor Nessie from Ernest.

The Ferret Network's been having trouble with their ratings, and as a last resort, they hire four new people, who happen to be spin doctors, that put spells on people, forcing them to watch TV in a trance. How is this bad for dogs? They go unfed, of course! Secret Agent Ralph is sent in, undercover, in an executive robot, where he discovers the spin doctor scam. Together, he and another Spy Dog destroy their curse, and leave the spin doctors to the Ferret Network.

Catastrophe has stolen the Eye of Osirus and the Staff of Pharfigruttentuttenruttenschnarfen to reanimate cat mummies to do his evil bidding. He plans to awaken Cleopatra's cat with the help of Bast so he can rule with her for all eternity. The Spy Dogs must go up against the millions of cat mummies and stop Catastrophe.

Ralph becomes impatient with his master's wanting to play Fetch. But then Ralph has a flashback and remembers how the game of Fetch came to be, as told by his old teacher, Dahg Chow. The story relates to the very first Spy Dog, of the name "Fetch."

The fleas offer to make peace with dogs. So Ralph, Mitzy and Von Rabie are shrunk down to meet with the fleas. But they're shrunk down too little and the fleas kidnap them to hold for ransom. The Bark Squad is then shrunk too to save our heroes.

The world's water supply is disappearing, it's a real mystery. No one can find the leak. And Ralph must rely on luck to find the problem.

All of kids' favorite fast food restaurants are being changed into fish restaurants that are only serving raw fish! The evil mind behind all of this? A simply evil, genius blowfish. Now the SpyDogs must stop him to save the children!

Something terrible is happening to dogs all across the land. They are being forced to wear clothes! And I don't mean those little doggy shirts you can find in pet stores. The money-loving Miss Oatz Cautere is designing the most outrageous doggy clothes. These clothes hinder the SpyDogs in doing their doggy duties. They must show the truth about the clothes to stop their owners from buying them.

Agent Mitzy happens across an unidentified humanesque robot while patrolling the Nebmart Grocery Store in Angus' Ethal 3000 module. The housewife robot disintegrates the Ethal, and soon a battle of technology starts between the SpyDogs and the looney, kid-genius Dr. D'Cell.

The principal of the local school gives the kids a surprise halfday. Because this wasn't planned the SpyDogs must work quickly so they can assign dogs to watch over the children. But there's one child in particular that no one wants to watch over: Little Timmy. Ralph decides to take watch over the kid, little does he know what lays in store for him and his friends...

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Dog owners everywhere are beginning to act wierd when they get a certain phone call. The calls are traced back to Miss Pavlov's School of Obedience. Ralph investigates to learn that Miss Pavlov is a hypnotist, taking control of the dog owners' minds. Ralph must call in for special back up and turn Pavlov's tricks back upon herself.

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The Space Slugs have invaded the schools as cafeteria ladies. They're putting an evil enzyme in the foods causing the children to turn into Space Slugs. The horrors! Ralph and food expert, Agent Noodle, must put a stop to this poisoning, and fast!

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Two farm girls are giving their hog a special formula so they can get revenge on not winning the prize hog contest at a fair the last year. But the hog ends up drinking too much of the formula and grows to a spectacular size! He leaves the countryside and rampages through town. And Ralph must trust Scribble to come up with a special food to attract the pig away from the city.

It all starts when an astronaut pins a flag on the moon, right on the moons weak spot, and the moon is punctured. Yes, the moon had been basically a floating balloon. But now the SpyDogs must work to rebuild it, and make it tougher. Unfortunately that requires a *lot* of money in a little amount of time. However will the SpyDogs manage?

There is a rumored bad dog in town. The SpyDogs are agast! He's not in their databanks, so Ralph offers to go check him out. But when Ralph and Mitzy finally confront the dog, Ralph can't do anything, because the "bad dog" is his brother, Mange.