Subterraneans Part 1: A millionaire businessman is found dead 12 months after his disappearance, and evidence suggests he had been imprisoned in a cellar. [S]
Subterraneans Part 2: Stella puts together damning evidence against Dr Henderson, convinced he is behind a series of murders. But then he suddenly disappears along with his wife. [S]
Straw Dog Part 1: The appeal of a man convicted of mutilating his victims stirs up memories for Grace, who begins to question the decision she made 30 years ago. [S]
Undertow Part 1: The team connects a soon-to-be-released benefit fraudster with a string of murders and works to solve the crimes before he is set free to kill again. [S]
2/8. New evidence points to suicide but, when Boyd and the team exhume Perry Coleman's body, DNA tests reveal some disturbing facts that call this into question. Also in HD. [S,AD]
1/8. When Detective Superintendent Boyd encounters a woman unable to accept the explanation of her father's death in a terrible car crash, he takes on the case. Also in HD. [S,AD]