Private is upset when Mort is chosen to be the cover animal for the zoo's brochure.

The penguins aren't happy when their fish supplies are replaced by imitation fish cakes.

Mort quadruples in size after being exposed to Kowalski's super-ray.

Officer X of New York City's animal control is after Max, the penguins' stray cat friend.

The sewer rats challenge the penguins to a game of ice hockey.

When the vet rounds up the penguins to give them a shot, Skipper's fear of needles takes over.

When a robot is sent to the zoo to learn from Julien, the penguins set out to retrain it.

Maurice is left in charge when Julien is carted off to the zoo infirmary.

After Rico ingests a strange liquid, he discovers he can no longer regurgitate items from his belly.

Marlene's can't stand her new roommate, so she asks the penguins to help get rid of her.

A giant balloon float of a killer whale haunts Private.

Phil tries to win the heart of a visiting chimpanzee named Lulu.

The penguins must ditch the watchful eye of a nosey scientist before he stumbles upon all their secrets.

A girl loses her doll at the zoo, and Rico is convinced to give up his own doll to replace it.

When Skipper steals Julien's radio batteries, a wild chase gets them stuck in a kangaroo pen.

Marlene goes to greet the mysterious new animals... then promptly disappears.

When a solar eclipse occurs, Julien is tricked into thinking it's his fault.

Rico ignores a freaky fortune from his cookie, but Julien thinks Rico needs to believe in the superstition.

The rats have been terrorizing Roger the alligator, so he comes to the penguins for help.

When Marlene sets foot outside of captivity, she snaps and becomes a feral beast.

The penguins leap into action when a spooky noise frightens Marlene.

The penguins and lemurs face off in a winner-take-all race around the zoo.

Maurice bribes the animals with candy so they'll celebrate "King Julien Day."

Skipper accidentally causes King Julien to lose his beloved crown. Now the penguins go on a dangerous mission to retrieve the crown from the sewer.

When the penguins lose access to their favorite snack, Skipper and crew leap into action to find a new supply.