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.

Cast: Steve Pemberton, Rupert Penry-Jones, Phil Davis, Ben Bishop, Hannah Walters, Claire Rushbrook, Joan Blackham, Angela Pleasence, Michael Fitzgerald, James Woolley, Diana Kent, Charlotte Hope, Ann Davies, Mark Rice-Oxley, Geoff Bell