On the A1, officers battle to stop a dangerous driver from careering down the carriageway in 18 tons of stolen lorry. After a successful strike with a heavy-duty stinger, the driver carries on until he runs out of road and takes his chances on foot. but he crosses the path of two security dogs on duty with their handler. Meanwhile, in Sutton-in-Ashfield, firearms cops Richard and Ash are forced to use the big red key when a wanted man refuses to open the door, and over in Hucknall, the results of a roadworthy check don't go down too well.