PC Gray and Sgt O'Donovan respond to a report of drunk driving. Meanwhile, a suspect bites a police dog.

On Anglesey, PC Mark Lee fights for his life after a driver deliberately runs him down and leaves him for dead. Later, a Wiltshire officer tries to persuade a violent man to hand over his distressed baby.

Police are against a knife-wielding man in Bedford. Elsewhere, an officer is knocked out cold by a pub-goer.

In separate incidents, PCs Ben, Launa and Rafal as well as PC Carroll attend to reports of knife violence.

PC Davey and his dog Bacca face a knife-wielding man. In London, a routine car stop late at night turns into a life-threatening incident when the driver jumps in his car and departs with PC Morley left clinging to the car door.

A late-night patrol pulls over a man suspected of driving under the influence but the officers soon find themselves dealing with much more. Meanwhile, officers responded to an emergency call from residents on an estate.