Continuing the investigation of the death of a teenager whose body was found in concrete on a building site years ago. The injured Joe McDonagh finally wakes from his coma - but how much light can he throw now on a boxing bout which went badly wrong long ago?Meanwhile, there are surprises in store for Boyd and Jordan.

MI6 asks Boyd to reopen the case of the killing of an Iraqi dissident.Meanwhile, a man running for election as President of the Sudan announces he is going on hunger strike to protest at Britain's refusal to return the skull of a 19th century leader.

Boyd finds a connection between the recent murder of an Iraqi and the local ruler's skull taken from the Sudan by British troops more than a hundred years before.

Two sexually conjoined mummies mysteriously fall through the the ceiling of an old City bank, resulting in the Cold Case team being called in to investigate.

As tension builds between Grace and Boyd the truth about Lisa is revealed. Meanwhile, the team have a new lead following on from Declan's death and it's a race to find the murderer before Lisa does.

Two days after James Jenson is released from a psychiatric unit, the wallets of his victims are sent to a relative. Does this mean more murders could follow? And is James really responsible for the three coldcase murders, or did he take the blame for somebody else?

The plot thickens as Rivelli and then Harris confess to the three cold case murders. Boyd remains suspicious though - who was the real murderer and what has Jensen got to do with it all?

A psychiatric patient, imprisoned for the murder of his parents as a teenager escapes and reveals the location of an unknown corpse.

The case becomes more complicated as Boyd discovers that alterative practises may have contributed to Daniel's instability.

Boyd receives an anonymous package in the post – a Nazi ceremonial dagger. Attached to it is a Cold Case number, linking it to the unsolved murder of a young girl in May 1945. It seems that Mel had been working on the case before her death, what does this mean for the Cold Case Team?

As Ben goes missing, Boyd and his team try to force the truth out of a confused David. Boyd grows increasingly close to Sarah, and Stella travels to Poland to investigate the true story.