The team face their toughest challenge ever: tracking down Lucas North, their Section Chief, friend and one of the best agents MI5 has ever had.
Harry decides the team are too close, and brings in a specialist to help with the hunt. But it will not be easy to find a man who has nothing left to lose, and as the search becomes increasingly desperate, Harry and Lucas become embroiled in a deadly game of cat and mouse.
|Harry Pearce||Peter Firth|
|Lucas North||Richard Armitage|
|Ruth Evershed||Nicola Walker|
|Tariq Masood||Shazad Latif|
|Beth Bailey||Sophia Myles|
|Dimitri Levendis||Max Brown|
|Home Secretary||Simon Russell Beale|
|Vaughn Edwards||Iain Glen|
|Maya Lahan||Laila Rouass|
|Alec White||Vincent Regan|