Edward Harper asks Vincent to investigate the death of his son, who was fatally knifed in a nightclub. The prime suspect is Ian’s friend, James O’Connor, son of the club owner, but the police are unable to touch him due to a lack of evidence. The investigating officer on the case is his ex-partner's new love, DCI David Driscoll.

• Suranne Jones
• Joe Absolom
• Ray Winstone