Boyd has to battle his demons when the case against a mass murderer, who killed his close friend, is reopened.

The team finds additional exculpatory evidence on convicted spree killer and finds evidence of several cover-ups.

DNA evidence clears a man of the murder of his adopted fisherman stepfather eleven years earlier, but who killed him and who was responsible for the simultaneous disappearance of three female family members?

Another member of the Lovell family turns up in the family boatyard under a pile of cockles minus a head and hands.

The CCS is alerted to sexual abuse of young boys in care homes. The team race to identify the murderer before his vengeful victims reach him.

The discovery of a mummified body opens an investigation into a supposedly fictional film from the 1960s. It transpires that the gangster responsible for the bodies behind the walls in the Notting Hill house is still active today.

The evidence points to the house being a dumping ground for dead bodies and the four corpses being the result of multiple rather than a single event.