The firearms squad approach a man suspected of having a loaded crossbow in his flat. Officers raid two properties as they search for stashes of a synthetic cannabis substitute, and Jim and Ben pull over a driver who turns out to be over the legal limit and possessing cannabis and cocaine.

Officers Jim Carrington and Lewis Marshall hunt down a familiar foe - a Citroen Picasso that has given cops the slip three times in a week. Meanwhile, the knife crime team are circling an estate, waiting for a suspected dealer to slip up, and an officer proves that age is no barrier by chasing down a young man less than half his age.