Frustrated by their obnoxious lemur neighbors, the penguins decide to take a vacation...to the moon. / The penguins leap into action when a spooky noise frightens Marlene.

The popularity of stuffed Mort dolls causes Julien to sabotage the toys, prompting a recall. Maurice bribes the animals with candy so they’ll celebrate “King Julien Day.”

Marlene discovers a lost egg and thinks the Penguins would be perfect egg watchers. / When Skipper steals Julien’s radio batteries, a wild chase gets them stuck in a kangaroo pen.

Skipper and the penguins bet that they will win a game against the lemurs; Julien passes a "no feet touching" law and exiles Mort from the lemur habitat.

When the zoo installs web cams to bring in new visitors, Private accidentally becomes an Internet star. / 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.

The animals all start to disappear when the zoo acquires new residents; Maurice is left in charge when Julien is sent to the zoo infirmary.