"Purr-fect Partners": Dudley Puppy is now a recruited agent of the super-secret undercover organization Turbo Undercover Fighting Force (T.U.F.F.) and his reluctant new partner, Kitty Katswell. The heroic super agents team up to stop Verminious Snaptrap, D.O.O.M.'s ill-mannered supreme leader, from enslaving all of the rats in Petropolis. Together Dudley and Kitty promise to be quite an imposing crime-fighting duo.

"Cruisin' for a Bruisin'": To distract Dudley from bothering her on T.U.F.F.'s vacation cruise, Kitty lies and tells him that they are on a stakeout. Little does she know, Snaptrap and his iceberg of D.O.O.M. are actually headed right for their cruise ship.

"Chilly Dog": Things get frosty when Dudley and Kitty's latest secret mission requires that the crime-fighting duo go undercover as ice skaters after the world's greatest figure skaters are kidnapped. To get in it will involve some crossdressing...
"The Doomies": Disguised as super villains, Dudley and Kitty attend the "Doomie Awards," an award show in which villains show off some of their pesky and evil moves. Once again, it's up to the fearless heroes to foil each crime before their identities are discovered.

"Disobedience School": The T.U.F.F. agents are excited to go to Lava Land, until they learn about Snaptrap's new school for criminals. Dudley must go undercover and infiltrate the new school – while the rest of the T.U.F.F. agents have a fun time at Lava Land!
"The Dog Who Cried Fish": It's Dudley's turn to pick up the office lunch, but it goes horribly awry when he reels up from the water an insane fish named the Caped Cod, who not only wants to rule the "Above Water", but also destroy Dudley whom he thinks is the king!

"Guard Dog": When the Chameleon witnesses Snaptrap committing a crime in a neighboring town, he agrees to testify against him. It's up to Dudley to keep the Chameleon safe from Snaptrap on the long train ride to Petsburgh! But who will keep Dudley safe from the Chameleon's weird habits?
"Dog Save the Queen": When the Chameleon threatens to relieve the Queen of the United Kingdom of her Crown Jewels, Dudley and Kitty are called in to assist B.U.F.F. – the British Undercover Fighting Force. But rooting out the Chameleon in a strange land proves to be quite challenging, especially with the language barrier! Thus they must keep the Chameleon in England because they weren't assisted by S.C.U.F.F., R.U.F.F. or G.R.U.F.F. to go after him.

"Doom and Gloom": Larry has finally snapped under Snaptrap's ruthless authority and forms his own evil agency, dubbed G.L.O.O.M. – Genius Larry's Order Of Mayhem. Much to Dudley and Kitty's chagrin, it turns out Larry is better than Snaptrap at being bad!
"Law and Odor": Petropolis' worst smelling villain, the Stink Bug, has returned to make life odorous for T.U.F.F. Keswick has a cold and Dudley's super sensitive snout is rendering him helpless. T.U.F.F. needs a plan and fast, before the Stink Bug turns Petropolis into a cesspool of stench!

Petropolis' villains team up to hijack Christmas. Dudley and Kitty need to stop them and save Santa and his elves before midnight or nobody can get presents this year!

"Big Dog on Campus": Dudley and Kitty go undercover at Dudley's high school reunion to stop an unknown villain from blowing up the reunion.
"Dog's Best Friend": Snaptrap sends a killer robot to destroy T.U.F.F., but Dudley finds it and befriends it.

"Lie Like A Dog": Dudley constantly lies about having a dentist appointment to get out of work at T.U.F.F., but he ends up stopping villains while he is relaxing, and he has to conceal his identity when he is caught on camera, and he can't claim the rewards he is offered for fear of exposure.
"Cold Fish": The deranged Caped Cod has escaped and vows to destroy Petropolis by melting the Rhode Island-sized Ice Bird Iceberg and flooding the city. Dudley's not sure who the real enemy is – the Caped Cod or the pants Dudley has to wear to stay warm enough to defeat him.

"Bark to Nature": After getting information of Snaptrap stealing picnic baskets in Yellowbone Park, the T.U.F.F. agents use Keswick's new RV to drive to Yellowbone Park and stop Snaptrap.
"Mutts and Bolts": After getting struck by lightning, Dudley can now predict the future.

Note: This episode aired on Nickelodeon in Latin America, Italy and Poland before airing in the US.

"Dog House": Snaptrap tries to get close to Dudley under the disguise of a new roommate!
"Time Waits for No Mutt": After always being constantly late, Dudley is warned by The Chief that if he's late one more time he is fired. So Dudley must try to get to work on time but the villains plan to stop him at all costs.

"Hush Puppy": Kitty, Keswick and The Chief can't support that Dudley yells all the time, so Keswick decides to put Dudley on a special collar that blocks his voice.
"Quacky Birthday": Just a few days until Dudley's birthday, both Quacky the Duck and Sharing Moose come to offer a false place to celebrate his birthday.

Note: This episode aired on Nickelodeon in Latin America, Italy, Greece and Poland before airing in the US.

"Sheep Dog": Dudley goes undercover as a lady sheep to catch the Chameleon.
"Mom's Away": T.U.F.F. gets information that Snaptrap has taken all the mothers.

"Love Bird": Bird Brain invents the "Lovey-Dovey-Kissy-Smoochy" gun, a device that makes his target fall madly in love with him, and give him whatever he wants. He tests it at the First Petropolis Bank, where he attempts to put the bank's loan manager Becky under his spell, but Dudley shields her from the blast and he winds up falling in love with Bird Brain instead.
"Bluff Puppy": F.L.O.P.P. returns to commit crimes with the help of a buffalo named Bluffalo, who just lies about committing crimes, rather than committing them at all.

"Rat Trap": Dudley and Kitty take pity on Snaptrap and plan a staged arrest at the Snaptrap family reunion.
"Agent of the Year": Dudley and Kitty find out they've made the same number of arrests and are tied for the Agent of the Year award, so they both go on an arresting-spree to see who will win the award.

"Barking Tall": Dudley wants to be taller, so he uses Keswick's Growth spray.
"Bad Eggs": Bird Brain steals eggs from the delivery ward of a hospital to hatch them with his evil incubator, thus getting a new army.
Note: This episode aired on Nickelodeon in Latin America, Russia, Italy and Poland before airing in the US.

"Carbon Copies": Dudley is playing in Keswick's imagination station, but when he leaves the door open, his imaginations escape and cause havoc in Petropolis.
"TUFF Cookies": As Dudley is sad because he has never been a spokesman, he accepts to be in Quacky the Duck's commercial for his new cookie brand "Animal Quackers".

"Subliminal Criminal": Dudley drinks Keswick's formula to understand criminal minds.
"Acting T.U.F.F.": Dudley's favorite actor Woodchuck Norris comes to make a movie at T.U.F.F.

"Close Encounters of the Doomed Kind": Snaptrap steals an alien ship and uses its weapons to wreak havoc on Petropolis.
"Golden Retriever": D.O.O.M. search for a gold nugget in a town from the Old West, and their actions could result in the town collapsing.

Snaptrap, D.O.O.M, and The Chameleon are stealing gifts at weddings. Dudley and Kitty must marry in an attempt to stop them.

"Crime Takes a Holiday": The Chameleon disguises himself as the Easter Bunny and goes on a crime spree in Petropolis.
"Flower Power": Birdbrain finds a rare flower that makes him indestructible. Dudley and Kitty go to the rainforest to stop him.

"The Spelling Bee": The Wanna-bee snatches all the kids at the spelling bee and challenges Dudley to a spelling competition.
"House Broken": While T.U.F.F. is away travelling, Snaptrap breaks into Keswick's house to steal his latest invention, the head shrinker.

"T.U.F.F. Choices": Snaptrap uses an indecision ray on T.U.F.F.
"Sob Story": Dudley uses fake tears to get whatever he wants, but his excessive crying soon leads to others questioning his ability to fight crime.

"T.U.F.F. Sell": Snaptrap buys T.U.F.F. and Dudley continues to work there.
"Tattle Tale": F.L.O.P.P. sends Wanna-bee to go and rat out Dudley and Kitty when they get a photo of them sleeping on the job.

"True Spies": Kitty and Dudley accidentally eat Keswick's truth syrup and can't stop telling the truth.
"Bagel and the Beast": Everyone in Petropolis is convinced that Bigfoot is a robber, so Dudley tries to clear his childhood hero's name.

"Dancin' Machine": Dudley teams up with the Chameleon for Petropolis' dancing competition.
"The Good, The Bad and The Quacky": Quacky and the Sharing Moose stage a fake reality show and invite T.U.F.F. to compete against DOOM, live on the show.

"Pup Goes The Weasel": The Weasel, a super diabolical criminal, has broken out of prison and is after Dudley and Snaptrap.
"Puppy Pause": Dudley finds time-stopping gloves that freeze time. Snaptrap steals them and T.U.F.F. must get them back before time stops forever.

"A Tale of Two Kitties": Kitty's evil twin sister Katty Katswell swaps places with Kitty to steal the golden fish bowl at the Petropolis Museum.
"Pup in the Air": Birdbrain uses an anti-gravity device to fly, however, he cranks the device up and all of Petropolis is floating.

"Hide and Ghost Seek": T.U.F.F. is hired to get rid of a ghost inside an old mansion.
"Cod Squad": The Caped Cod puts a robotic shark in the lake to nab the fishermen in Petropolis.

"Great Scott": T.U.F.F. goes to Scotland because Dudley is a descendant of a legendary Scotland hero who defeated the Loch Ness Monster.
"To Be or Not to Bee": Dudley and the Wanna Bee team up to defeat Wanna Bee's brother who got mutated by scientists and plans to rule the world.

"Puff Puppy": Dudley accidentally creates an interdimensional vortex, which makes everything that enters indestructible and "puffy", but on the downside also expand until explosion.
"Stressed to Kill": The Chief is on the brink of a nervous breakdown because of Dudley, who is trying to help him relax.