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