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

After a knife falls out of a criminal's pocket in Bedford, it takes three officers to get him in cuffs. Meanwhile, 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. Meanwhile, PC Carroll happens across a street mugging.

Officers in North Yorkshire responding to a report of anti-social behaviour have to deal with a violent bystander as well, who breaks the leg of an officer while resisting arrest. In North Wales, a police van on its way to a domestic disturbance call-out is flagged down by a member of the public, who alerts the officers to a drunken confrontation between two groups of young people.

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.

PC Mike Davey and his police dog Bacca are faced with a man armed with knives. Meanwhile in London, a routine car stop late at night suddenly turns into a life-threatening incident when the driver jumps in his car and drives off and PC Nick Morley is left clinging to the car door.