A door knock arrest snowballs into a fire-arms stand-off for Damo, Spike uncovers a stash of cannabis stored with lethal shotguns, police dog Ronnie lands right on top of a wanted man, and Ben legs it after a runaway driver.

The pursuit of a white van tearing up the turf in Willington proves to be a family affair, a two-year-old German shepherd cross named Titan earns his spurs, and Paul is sent on a roundabout hunt for a drunk driver. And Sam discusses police policy with a disqualified driver who won't accept he's in the wrong.