Guest Stars Sarah Hadland as Monica Draper Lee Mack as Willy Watkins Shobna Gulati as Vicky Jason Manford as Freddie Hannah Waddingham as Chief Inspector Shepherd Kiell Smith-Bynoe as Detective Marcus Connie Walker as Jean Phil Cornwell as Tony Jason Cook as Sgt. Dirk D.D. Richard David-Caine as Tariq George Fouracres as Forensic 2 Tom Bell as Barry James Bradwell as Forensic James Gault as Craig Farrel Jo Hegarty as Jemima Niall Ransome as Police 1