Sgt Jon Moon and his police dog Kanto follow a trail of broken glass and spilt alcohol, leading to a confrontation with a robber wielding a nasty-looking knife. Elsewhere, a fight in a club ends with one man in handcuffs and another in hospital, Barry Peach plays catch-up as a teenage driver tears up the streets of Skegness, and Jon Peacock detects a whiff of cannabis in a quiet rural village