S1·E21 Brewster and The Dragon

A storm has left the Safari Park in a bit of chaos, and some animals have escaped! Emery teases Brewster, saying one of the escapees is a dragon. So when one of the fugitives - a golden bell frog - makes his home in a tunnel that amplifies his distinctive 3-note croak into a mighty roar, the trainees are convinced that Emery is right!