The hunt is on to find a gang of suspected cannibalistic killers lurking in the sewers before a missing girl becomes the next victim. The station is under attack and the forces of evil are moving against the team on all sides, and as the case takes a dangerously personal twist for Chandler, he must resort to desperate measures.

• Ben Court
• Caroline Ip

• Hannah John-Kamen
• Steve Pemberton
• Phil Davis