Mysterious monsters are rumoured to be lurking in Flamingo Lagoon and keeper Pete Smallbones is on a mission to prove to the zoo that the monsters are real. The keepers and animals all think that Pete is making it up, until Sid the seagull mysteriously disappears. Could Pete be telling the truth? Meanwhile, over on gorilla island, Jurgen and the boys are having to deal with an invasion of their own as Komodo rabbits and strangen rodents start appearing in their enclosure.

Who is the most popular animal at the zoo? There's only one way to find out - by counting which cuddly toy sells the most in the gift shop of course! To find the winner, all of the zoo animals go head to head in an ultimate talent contest - the tapirs sing, the orangutans use their circus skills and the baboons try their hand at stand-up comedy. Everyone's sales are up except the gorillas, so in a last ditch attempt to boost their popularity, Geoffrey plays his enchanting 'nose-flute' - but it will it be enough to impress the public, or will an unsuspecting animal win the popularity contest?