Virus (Part 2): Commander Blake's terminally ill sister moves in with her while Blake deals with the dangerous computer hacker who has threatened to kill more patients every 24 hours.

Blackdog (Part 1): Patient and persistent, Deputy Chief Constable Stephen Blackton (David O'Hara) has earned his nickname, "Blackdog," as he is called in to re-open the investigation of the Lionel Cripps shooting.

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.