During a handover to the head of counter-terrorism of MI5, Harry Pearce, a terrorist escapes custody. When Harry disappears soon after, his protégé is tasked with finding out what happened as an impending attack on London looms, and eventually uncovers a deadly conspiracy.
- Genre: Thriller, Action
- Studio: Creative England, BBC Film, Isle of Man Film, Shine Pictures, Pinewood Pictures, Kudos
- Keyword: corruption, escape, police, explosive, kidnapping, flashback, conspiracy, terrorism, one man army, massacre, sabotage, innocent person killed, mi5, disobeying orders
- Cast: Peter Firth, Kit Harington, Elyes Gabel, Jennifer Ehle, Tim McInnerny, Tuppence Middleton