Neil the wimpy lion is under pressure from his overbearing mother-in-law to ‘man up' and ‘get buff' - like previous alpha-male lion Maximus.

To prove he too can be a powerful dominant male, Neil seeks out ways to improve his physique and, impressed by Jurgen's muscles, he decides to copy the gorilla and go ‘vegetarian'.

The new veggie diet however, doesn't go down too well for carnivore Neil – he misses his meat with a ‘side order of meat' and despite his best efforts to ‘kill some carrots' his mother-in-law still isn't impressed. Poor Neil.

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.