Detective Sergeant Tommy Murphy is a maverick cop with a dark past. After failing a psychiatric assessment, he's given one last chance by his boss and given a dangerous undercover assignment. A loner with little to lose and dealing with everything on his own terms, this time around, however, Murphy has an ally in Detective Inspector Annie Guthrie.

• James Nesbitt
• Andrea Lowe
• Jessica Oyelowo
• Ian Redford
• Robbie Gee
• Tim Plester
• Christopher Fulford
• Sarah Ball