There is a serious road crash involving a Porsche, a motorcycle, a coach, a lorry and a Cortina resulting in six deaths. The Porsche had been tampered with prior to the accident and turns out to have been made of three different cars. Brownlow sets up a temporary morgue at a local school; W.P.C. Martella and P.C. Muswell have the job of informing relatives of the deaths. After following the trail from the Porsche, D.I. Galloway raids a scrapyard only to find D.S. Burnside from the robbery squad undercover as a buyer, about to break the ring, but having forgotten to tell Galloway.

W.P.C. Brind and P.C. Melvin are on foot patrol, but are seperated. Brind ends up dealing with a workplace dispute by herself, but the ringleader, Nobby Briggs, smashes her radio and locks her in a storeroom. When Melvin eventually turns up, he calls for assistance and Briggs is arrested. Sgt. Cryer is in a bad mood as he is suffering from a painful toothache, and he yells at a prisoner and pushes him. Lay visitors from the council arrive to inspect the station, and the prisoner accuses Cryer of assaulting him. His cellmate eventually clears Cryer, but he has to cancel his dentist appointment when he is called up to Ch. Supt Brownlow's office over the incident.