Motorway patrollers Gavin and Ryan race to a serious car fire on the M60, fearing that someone may be trapped inside, a breakdown in the middle of the night in an unlit section of motorway puts lives in danger, and a serious accident is narrowly averted when an HGV runs over a rogue wheelbarrow on the M60.
A head-on collision at rush hour brings the M66 to a standstill, and patrollers Martin and Gavin have to get the thousands of people stuck in the queue off the motorway. When a swan goes walkabout on the central reservation, patrollers Victoria and Darren are urgently sent to prevent the bird from causing a serious accident - but the swan isn't keen to move on.
Patrollers Sharon and Victoria come to the rescue of a terrified family who have broken down in the middle of the M60 with a baby on board. Mickey and Lee race to a three-car collision on the M6 with the help of a blue-light police escort, but find the driver of one of the crashed vehicles has locked the doors and left with the keys.
Manchester is gridlocked for over an hour when a multiple car pile-up blocks the M60 and patrollers Sharon and Tony are left to clean up the mess, but are surprised when one of those involved tells them he's just seen another crash. A monster pothole forces the team to temporarily shut down half of the M60 before someone is seriously injured, while eight miles of the M6 are brought to a standstill when they a flood of calls report a dog running up the middle of eight lanes of high-speed traffic.
The entire motorway must be shut down after a high-speed motorbike crash on the Spaghetti Junction, just outside Birmingham. The patrollers worst fears are confirmed when they discover an injured man lying in the carriageway. Officers Mickey and Lee discover an abandoned caravan parked on the hard shoulder.