Waking the Dead - Season 4

A common theme, linking three murders over a 60 year period, is discovered when the case of the murder of an ex-soldier is reopened. Can the team prevent a fourth killing?

The team know what links the victims but they are still searching for the motive - and for the murderer.

Who is the skeletal inhabitant of a car abandoned in a disused garage, and what links him to the assassination of a government minister 25 years ago?

An ex-army officer who served in Northern Ireland's Troubles points Boyd's suspicions towards the security services, making the case more complicated than ever.

A man is admitted to hospital 15 years after he and his twin went missing from their home. Before he can be interviewed, a murder takes place and he goes missing once more.

Mel is suspended from the case pending an inquiry, while Grace and Boyd have more questions for Roper, but the doctor is in no position to answer them.

Sam Jacobs is released from prison to start a new life. When a man is murdered in his hostel, he becomes a suspect - but he may have been the intended victim.

The secret past of the team's guitar teacher suspect is revealed, and Frankie is embarrassed following the attack on the lab.

A man is found dead at a hotel with a word carved into his back, the hallmark of an old crime that the cold case team is already investigating.

The cold case team continues to try to unravel the macabre murders, and DNA evidence brings them towards their suspect.

A woman torches her home, killing her family. She claims that she was incited to commit arson by a mysterious figure called 'The Shepherd'.

Boyd's team are sure the dark figure cited by two homicidal psychiatric patients exists, and continue to investigate the mysterious Shepherd.