Blackdog (Part 2): After Graham Warner, the officer implicated in the Lionel Cripps shooting, is found dead in a park. Commander Blake continues to bury evidence of her relationship with James Lampton.

Blacklight (Part 1): A young woman disappears from a nightclub, and a mental patient, Reginald Aitken (Nickolas Grace) escapes from a hospital. Hours later, the two are found together covered in her blood.

Blacklight (Part 2): Dutch DI Count Eric Van Hauten offers to help DCI Hedges with a new murder case. Commander Blake pledges to remain uninvolved, but will she be able to as the threat of more victims increases?