‘Good night, Gorilla’, says the night watchman as he finishes his rounds at the zoo. But Gorilla has other ideas, deftly pick-pocketing the watchman’s keys and letting himself out of his cage, whilst letting Elephant, Lion, Hyena, Giraffe and Armadillo out too! The weary watchman makes his way home and into bed…unaware that his friends from the zoo are right behind him.