Called to an old hanging post after a man thought to be drink driving, two officers end up fighting for their lives. A suspect bites a police dog and attacks his handler, and a traffic officer is dragged into a busy road by a violent motorist.

PC Mark steps in front of a car to ask the driver to stop, but the driver uses his car as a weapon; a criminal in handcuffs steals a police car to use as a getaway vehicle, with the officer still inside it.

After a knife falls out of a criminal's pocket in Bedford, it takes three officers to get him in cuffs; a local bobby is knocked out cold after a pub-goer launches an unprovoked attack.

PCs Ben, Launa and Rafal thought they were attending a simple case of neighbours arguing, but the emergency call was a trap to lure the officers to an attacker's door; PC Carroll happens across a street mugging.

PC Davey and his police dog Bacca are faced with a man armed with several knives; a routine car stop late at night suddenly turns into a life-threatening incident in London.

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