In the series finale, despite the task force being fully convinced of Ames' guilt, Sandy seeks more definitive proof to convince the Justice Department to proceed with their own investigation. As the hunt closes in on Ames, Sandy's commitment to the job pushes her husband's patience and commitment to the brink.

Cast: Jodie Whittaker, Paul Rhys, Harriet Walter, Ralph Brown, Stuart Milligan, Christina Cole, Catalina Denis, Julian Ovenden, Lex Shrapnel, Joe Corrigall, E.J. Gong, Sarah Greene, Julian Lewis Jones, Akie Kotabe, Mitchell Mullen