Quinnan investigates when his vet is forced to treat a dog that has been injected with heroin. Quinnan catches the owner in possession of cannabis, but he refuses to reveal how the dog was attacked. Meanwhile, Boulton has had word that a nasty pair of Turkish brothers are back in town. When Quinnan investigates a burglary at the address of the dog owner, he finds the owner in possession of a quantity of heroin stashed inside a plastic elephant. Boulton then discovers that his Turkish friends are the ones who after getting it back, so the pair set up a joint operation. Meanwhile, Hollis organises an inter-station pub quiz, and has trouble protecting the questions from the opposing teams, and an opportunist thief.