Episode 1
When politician's wife and undercover spy Helen Webb learns that her lover has been murdered, the Black Doves recruit an old friend to help protect her.
Episode 2
After reaching a dead end in the search for Jason's killer, Helen has to fight for her own life, while Sam receives a threat from his former employer.
Episode 3
Memories of Sam's past come back to haunt him as he prepares to finish the job he started seven years ago. Wallace secretly meets with a Chinese envoy.
Episode 4
Investigations into the ambassador's death reach the highest corridors of power. Helen pays a risky visit to an old friend, and Sam faces a tough choice.
Episode 5
With danger drawing closer, Sam takes refuge in the only safe place he knows. Reed issues an ultimatum, and Helen gets one step closer to the truth.
Episode 6
Armed with evidence and bent on vengeance, Helen goes searching for the Clarks. As the conspiracy starts to unravel, she has a deadly decision to make.