
The adventures of four penguins—Skipper, Kowalski, Private, and Rico, who perform various commando-like missions to protect their home in the Central Park Zoo. The penguins often have to deal with problems caused, or made worse, by their zoo neighbors, King Julien XIII (a ring-tailed lemur), Maurice (an aye-aye), and Mort (a mouse lemur).






When a camera accidentally takes a picture of one of the lemurs at the zoo, King Julien thinks that he's trapped inside of the camera. Using their detective skills, Skipper and the gang search for the lemur before the start of the next zoo tour.
The penguins build a rocket to head to the moon after being annoyed by the lemurs. Once they land on the moon, they are greeted by a "moon cat".
Marlene, the new zoo otter, meets the penguins for the first time after being startled by a loud noise. Going underground in the sewers, Skipper leads the charge to find the source of the noise.
When toy dolls are made to look like Mort at the zoo, Julien gets jealous and has them taken back. Unfortunately, this causes the actual Mort to be shipped back with the toys.
A festive "King Julien Day" is held in Juliens honor. Unfortunately, no one will come unless Maurice bribes them with candy. And as much as Skipper doesn't want to join in the party, he can't seem to avoid it.
Marlene assigns the penguins egg-watching duty, prompting a jealous Julien to try to steal the egg.
When Julien refuses to turn down his radio, Skipper sneaks into his room to steal his batteries.
King Julien challenges the penguins to a game of Capture the Flag, but every time they play, the lemurs win, resulting in the penguins losing their posessions in every match.
King Julien decrees a new law stating that anyone who touches his feet will be banished from his kingdom. When Mort breaks this law by accident, the penguins take him in an attempt to rid him of his foot-touching obsession so he can return to the habitat.
Web-cams are positioned around the zoo in an internet popularity contest. The penguins despise this new motion and rebel, until Private makes a misstep and becomes the star animal of the zoo.
When Julien's crown falls into a sewer, Skipper sets up a mission to retrieve it. Meanwhile, Marlene tries to calm Julien down.
When the penguins, lemurs and Marlene go off to meet the zoo's newest exhibit, they all start disappearing one by one. When only Kowalski is left, he must save his friends by learning to act on instinct instead of intellect.
When Julien is taken to the zoo infirmary for acting even weirder than usual, Maurice is left in charge. Everything goes smoothly, until suddenly Maurice starts acting even crazier than Julien ever did.
Rico the Penguin is known for being helpful for coughing up random items, but today a zoo keeper gives him de-regurgitating medicine, normally this wouldn't be a problem, except that Rico has a time bomb in his stomach.
Skipper, Kowalski, Private, and Rico are all having fun today driving around the zoo in their small pink car, but trouble starts when King Julien wants to drive a car too, he gets jealous which results in a race to see who's better.
In this Episode, the animals get a liking for popcorn, until a kid is caught feeding them, and Alice the zookeeper hates the idea.
The penguins perform and display their cuteness to zoo visitors in order to prompt them to feed them with fish purchased from Alice. Julien observes this from his habitat, stating his resentment of the fish odor to the other lemurs.
The penguins' habitat freezes, so they decide to play a hockey game against each other. They are then challenged by a group of rats (the same rats featured in the Crown Fools episode) to play against them, since the rats cannot go back into their sewer home because the pipes burst.
Mason and Phil are fed up with the lemurs annoying them. They find out a solar eclipse is coming and tricked Julien by telling him the "sky spirits" are angry at him just as the moon covers the sun.
Skipper runs from the zoo veterinarian in order to avoid getting a shot. The penguins try to force him to do it, but Skipper seems to escape and avoid all they throw at him. Skipper even tries to distract the penguins, as in dancing, trying to attract them.
Mort quadruples in size after an accident with one of Kowalski's inventions, a super-ray designed to enhance fish. After finally realizing that Mort is super strong, Julien uses him to steal food and supplies from the other animals, like stealing an elephant's peanuts, Joey's (from Assault and Batteries) hay for Julien art work.
Marlene gets a new roommate named Rhonda, a walrus who is sloppy and has bad manners. Before her roommate arrives, she dances with Skipper and is very excited, but Skipper is paranoid that Marlene's roommate may be a spy, possibly with the intent of stealing Kowalski's newest invention, a device whose function is not yet known.
A space robot is sent to the zoo to learn from King Julien's behavior.
The zoo animals order Chinese food. All of the penguins read their fortune cookies and are happy with the results. However, Rico's fortune reads "You will meet a foul end". While Rico and the penguins do not believe in curses, Julien tries to make them believe by tricking Rico into believing that he is cursed (makes an elephant land on Rico, sends a popcorn cart in his direction) to the point where Rico hides in a pillow fort.
King Rat and his minions terrorize the penguin's alligator friend, Roger.
Private sees a killer whale fly over NYC, but no one believes him, more importantly, Kowalski, Rico, and Skipper think he's gone crazy because of the amount of sugar he had ingested prior to spotting it. In an attempt to prove that he's not crazy, Private heads out to find the whale he knows he saw.
When the penguins bring Marlene with them on a sno-cone mission in the park, she can't handle the freedom of being outside the zoo walls. Skipper and his team must capture the crazed Marlene before she goes permanently wild.
Max the cat is on the run from evil animal control Officer X, and he comes to the penguins for help. With the zoo on lock-down, the penguins decide to give Max a makeover and hide him in plain sight.
A female chimp named Lulu arrives at the zoo for a short stay, and Phil is smitten. Unfortunately, Lulu falls for Mason, and the penguins must step in to help Phil win her heart.
When the penguins are interrupted mid-operation by a nosy scientist, they leave the zoo in danger. Unfortunately, the scientist has radio-tagged them, so they must rely on the lemurs to complete the mission and save the zoo.
At closing time, the penguins hear a little girl crying that she has lost her doll, Private goofingly thinking Skipper was crying. Skipper quickly informs Private that is not him. The penguins try to throw it to her, but this backfires when the doll hits the girl and bounces into the sewer, making the girl cry.
At the zoo during night, King Julien's boom box gets stolen. Everyone gathers up and starts to complain about their apparently stolen items. Soon, Rico talks to Private and Private tells Skipper that their television has been stolen. Skipper and the penguins go off to confront the masked thief.
Furious with King Julien skunk bombing them the baboons steal his groove, using so called "magic" so he can't dance anymore and put it in a jar. Desperate for help Julien seeks the help of the penguins to get his groove back. But when fighting over the jar that contains his groove it breaks and enters Skipper's body. The baboons will only help if King Julien apologizes. But given his stubbornness King Julien still refuses to apologize.
When the zoo is affected by a blackout, the penguins know how to fix the situation, but Julien tries to take over.
The penguins mistakenly believe that Skipper is a zombie after breaking his wing.
The penguins use one of Kowalski's inventions to become ignorant of pain, to remove a hornet nest from the zoo.
Julien banishes Maurice and Mort to a tiny corner of the lemur habitat.
A tiny tree frog moves in and takes over the zoo.
The penguins are confused when they overhear Alice saying that the zoo has three male penguins and one female.
Private invites Mason the chimp to stay with the penguins when he and Phil are having trouble getting along.
Burt the elephant enlists the help of the penguins to escape the zoo.
The penguins are determined to set Marlene up on a date.
The animals try to make a commercial to make the zoo popular.
The penguins build a submarine in order to defeat a monstrous fish living in the ducks' pond.
Kowalski accidentally creates a living blob of jelly.
When a beautiful falcon crash lands in the zoo, Skipper insists that she stays to recuperate. But once she tries to eat Marlene behind their backs, Skipper and the others try to put her to a stop.
Private is upset when Mort is chosen to be the cover animal for the zoo brochure.
Bent on an agenda to take over the world, the penguins' mad dolphin nemesis, Dr. Blowhole, kidnaps King Julien in an effort to lure the flightless force into a trap so that he can annihilate them once and for all. It's up to the penguins to spring the trap before Blowhole's plan to flood the Earth comes to fruition.
The penguins fall under the spell of Skipper's idol, Rockgut.
Kowalski's future self visits and orders his present self to stop working on his time machine.
The penguins attempt to relocate Roger the alligator after dining with him in the sewers.
The penguins strive to protect the zoo commissioner from Frankie the pigeon's plan of revenge.
The penguins help Randy the sheep with a problem child in the petting zoo.
The penguins try to convince Eggy the duckling that their paramilitary activities are too dangerous for him.
The penguins, the lemurs, and Marlene race against the sewer rats to find the Lost Treasure of the Golden Squirrel.
When they realize their operation is at risk of being exposed, the penguins head to an ad agency to destroy the incriminating evidence.
The penguins and King Julien believe Marlene has the cooties after overhearing school children.
Bent on an agenda to defeat "Mr. Tux" in a round of mini golf, an armadillo comes to the zoo believing that one of the penguins is him.
Private must pass a difficult test on the New York streets in order to move up in rank and share a classified joke. In order to move up ranks Private must face a "haunted bus" but he is forced to safe the lemurs as they have been caught by the "haunted bus".
Private is repulsed when Rico befriends three cockroaches.
When a boy on a school trip sees the Penguins in action, the team scrambles into action to steal his notebook; meanwhile, Julien attempts to form his own team to claim his old backscratcher from the museum.
Marlene tries to help Private overcome his fear of badgers.
Disappointed at Skipper's refusal to allow him to use his explosive talents, Rico begins working for King Julien as a demolitions expert, but the new lack of restraint imposed by the other penguins results in Rico destroying Julien's habitat before he is contained.
When Kowalski invents a helmet that turns thoughts into actions- essentially granting the wearer the power of psychokinesis-, Julien steals it to use its power for himself, only for the entire zoo to be imperiled when Julien turns the helmet's power up to such an extent that he summons objects to him with mere casual thoughts.
A boa constrictor transfers to the Central Park Zoo and animals begin disappearing.
Private attempts to convince Leonard the Koala that the penguins are harmless.
Private discovers that the fountain grants wishes and Alice nearly exposes the penguins' operation.
King Julien finds out about April Fool's Day and makes up for all of the lost years by pranking the zoo animals.
Rico is determined to get an upgrade for his doll-girlfriend that will allow her to speak.
Skipper's old puffin enemy Hans comes to the zoo, claiming to be interested in friendship while really seeking to steal the penguins' lair for himself.
Kowalski, banned from inventing by Skipper, secretly invents an amazing device he cannot take credit for.
The penguins try to return a baby after Private accidentaly knocks it out of the zoo.
Rico takes their remote control car out for a spin and crashes it; After rebuilding it, it begins acting violently.
Kowalski steals the computer chip from Mort's new favorite game to finish his mind-reading device.
A devoted Russian repairman comes dangerously close to destroying the world when repairing the penguins' habitat.
Two thieves stash a jewel at the Central Park Zoo, and plan to find it, no matter who gets in their way.
After getting a kid's balloon back, Skipper mentions something about The Big One. He explains he has been waiting for it to come for months and he hid some plans in a remote area of the zoo for when the big one comes. But it is revealed that they are building a children's zoo on the spot he hid the plans, so now they try to get the plans before The Big One Comes. But Skipper then starts acting like a news reporter. Can Skipper stop acting like a reporter, and can they get the plans in time before the Big One comes?
After spying on everyone with the others, Private accidentally drinks Kowalski's Truth drink that makes you spill the truth and now Private starts telling all the animals secrets! Can the penguins fix this before Private spills everyone's secrets?
When the zoo closes for the Christmas holiday, the animals gather to begin work on Kidsmas, their annual holiday festivities mainly designed to delight the younger animals. Each animal is assigned a Kidsmas preparation task to perform, but Julien, desiring a different one, rearranges each animals' task.
Julien suspects a plot to overthrow or kill him is being orchestrated by Maurice after he overhears Maurice conversing with other animals about an ill-sounding plan.
When Burt gets a hold of Alice's paintbrush, he paints a picture of an elephant with it on a nearly wall to the delight of zoo patrons.
Private keeps injuring himself so he can see the new zoo nurse he has a crush on.
Officer X fills in for a vacationing Alice and keeps a very close eye on the penguins.
Kowalski's experiment on his brain goes awry, and he becomes dumber instead of smarter.
Julien has fun barking orders at new zoo occupant Clemson, whom Mort is suspicious of.
Skipper warns the team about the dangers of reading flashy comic books, but they don't seem to care.
Julien likes to party 'till the break of dawn, and the Penguins want peace and quiet.
Mort and his tail, Rodney, are chosen for a top secret spy mission. King Julien is jealous.
The Penguins do their best to make their new zoo-mates comfortable, but they keep messing up.
Skipper swaps places with King Julien for a day, and things at the zoo fall into disarray.
A fax with horrible news arrives at the Zoo: Maurice has only 24 hours left to live. So all the animals decide to make his last day unforgettable and treat him as a king. Even King Julien ! How will this day turn out eventually?
Private learns how to use his cuteness to his advantage..but will it work?
The lemurs' constant partying gets out of hand, so the penguins have them moved to the petting zoo.
The animals panic when they hear that a boa constrictor has escaped from the Hoboken Zoo.
An accidental zap from the Fresherizer ray turns Skipper into a baby.
When Skipper, Private and Kowalski get a food born illness, Rico must keep them from eating any more contaminated herring.
Private's uncle visits and reveals that he is a secret agent.
The penguins plan a vacation on the high seas but a storm blows them off course onto the streets of Hoboken, New Jersey. After being taken to the Hoboken Zoo and meeting some old friends, Skipper is adamant the zoo holds a sinister secret.
Skipper falls into a trap set by Dr. Blowhole (voice of Neil Patrick Harris), who then extracts Skipper's memories and uses them to find the other penguins and transform them into villains.
The Vesuvius Twins bring Skipper and Julien to their home and force them to fight one another.
Kowalski creates tiny robots which do the penguins' chores for them, but also grow overprotective of the penguins.
After witnessing a scout perform a good deed at the zoo, the penguins decide to up their good deed quota, however they learn that not all good deeds go unpunished.
Private and Mort are trapped in a vending machine. While they attempt to escape, King Julian believes they have been kidnapped by TV personality Professor Quimby.
Kowalski finds a way to stop time, unfortunately King Julian gets a hold of his device.
The penguins receive a warning that the notorious Red Squirrel has planted a brainwashed sleeper agent in their presence.
The animals stop receiving special treats from an old woman who may have been injured because of King Julian.
Kowalski is unable to attend a big inventor's expo due to his broken legs.
Private is blamed for hurting Dale the Snail.
The penguins erect a large toilet as a trap for Dr. Blowhole, but Julien wants it as his new throne.
Private helps a young leopard seal return to Antarctica, and his pals follow him in a submarine. However, danger looms when they get to their destination.
The penguins sneak out of the zoo at night to party with the other animals in the park, but they have trouble getting home by morning.
An extinct dodo is brought back to life, but his reckless behavior puts him in constant jeopardy.
Kowalski creates a love laser to make people fall in love, but it soon backfires.
Kowalski brings Jiggles back to life in miniature form, but trouble arises when Jiggles multiplies.
Lemmy the robot returns from Mars with a space squid.
Marlene plans a game night to help the zoo animals bond but it takes a terrible turn when the snacks run out.
Thanks to an impromptu bouncy game, Julian is launched onto a city bus that drops him off downtown. He is snatched from the street by Gladys who believes he is a stray cat and taken home to live with her other 'cats'.
Kowalski uses an invention to switch King Julian's mind with Rico in order to win a contest.
Marlene's fur is bleached when Alice over-chlorinates the otter habitat.
Skipper is doused with Inflatium and stress causes him to blow up like a balloon.
After realizing that Maurice's thumbs could prove to be very useful, the penguins recruit him into their team.
A toxic substance is emitted from the penguins' food-making machine, and it endangers the entire planet.
When the Zoo Commissioner's toupee gets stuck on Maurice, Julian & Mort believe it's a monster trying to eat him. Meanwhile the penguins attempt to track down the missing hair piece.
After Rico saves Shelly, she falls for him but things turn a little crazy when she kidnaps his doll in a fit of jealousy.
The penguins' plan to cure Marlene's feral behavior when she's outside the zoo so she can attend a concert goes awry.
A maternal possum moves in with the penguins after Hans trashes her own home, but her overprotective nature starts to interfere with their missions.
Skipper rewards Private for his valliant efforts on missions by taking him and his fellow Lunacorn fans Bing and Roy to see Lunacorns on Ice.
The Amarillo Kid returns, this time begging for the penguins' help because a pair of gophers are after his shell.
A stray dog refuses to give up Mort after believing he is a squeaky toy, so the penguins set out to rescue him with the help of Max the cat.
After watching a martial arts film with the penguins, Leonard starts sleepwalking in samurai fashion.
Skipper offers a day off from training to the penguin who can bring him a kipper, a difficult task with Officer X working at the fish market.
The penguins need Private's hypercute to escape Alice in order to see their favorite action star at the cinema, but Private's molting renders him unable to engage the talent.
Fred seeks financial advice from King Julien when he stumbles upon an oak tree loaded with acorns, but the Red Squirrel has his own plans for the loot.
When a baby Fossa is transferred into Central Park Zoo, King Julien finds himself on the receiving end of its constant biting.
A hen with psychic abilities moves into the zoo, and a skeptical Kowalski tries to prove she's a fraud.
Private babysits Momma Duck's ducklings while the rest of the team is away, and has to protect them from the hornets and the sewer rats.
Skipper must prove he can still be a leader when his strength starts to decline.
Private is upset that his favorite snack cake is no longer being made, so he orders a raid on the factory.
King Julien sneaks into the gorilla habitat when Bada and Bing receive a shipment of plantains.
Skipper has been having an absolutely perfect day, so he decides to try and get a hold of his file from the New York Danish embassy.
Rico is excited about a new line of princess accessories for his doll. In pursuit of these new accessories Rico puts the entire team in trouble.
Chuck Charles loses his job as a news anchor and gets a new one at the zoo, but tries to get his old one back by exposing the penguins' operation to the world.
Kowalski's enemy detector malfunctions and causes Skipper to believe all of his friends are enemies, and all of his enemies are friends.
When the Vesuvius Twins buy all the tickets to the annual zoo sleepover, the penguins try to plant a seed of good inside the troublemakers.
Private accidentally frees an ancient spirit from its urn, allowing it to wreak havoc on planet Earth in an attempt to destroy it. But much to the spirit's misfortune, instead of possessing Private, it possesses his Lunacorn doll.
Private wears a monkey suit disguise in order to take a trip to the moon.
The penguins are about to start their autumn schedule when a severe blizzard scatters the team: Skipper and Marlene are trapped in a convenient store with Officer X, Kowalski and Private are stuck with Fred in his tree, and without Rico, they must find a way to save themselves.
Rico gets some teenage beavers to fix a collapsing tunnel, but romance interferes with their work.
Doris the dolphin's quest to rescue her brother Francis from Seaville brings her to the lovestruck Kowalski.