Trevor Eve, Sue Johnston, Tara Fitzgerald, Wil Johnson and Felicite Du Jeu staff the MET's cold case unit, set up to investigate unsolved cases which are brought to their attention when new evidence comes to light.
Using cutting-edge techniques, the Cold Case Unit track down killers years after a murder.
Join us as we give the man behind no-nonsense DCI Boyd a slightly softer interrogation...
Sue Johnston talks about career highlights and playing a psychiatrist on-screen.