Officers hunt for three teenagers alleged to have threatened a shopkeeper with a gun. Two are swiftly put in cuffs, but one suspect seems to have vanished into a block of flats. Elsewhere, Jen and her crime-busting canine Quantum are called to intercept a burglar who's ransacking a school in the dead of night.

The officers are on the tail of a fast-moving Astra that has been reported as stolen, and Paul and Rich learn the delicate art of balancing police work with vulnerable suspects. Elsewhere, in Mansfield, the knife crime team are hunting in packs to stop a vehicle connected to drug dealing.