Guest Stars Grace Hogg-Robinson as Tess Marshall Emmanuel Imani as James Odubajo Ellie Kendrick as Stephanie Lodge Con O'Neill as Harry Rowntree Angus Wright as General Rodney Pickering Mark Bazeley as Sam Marshall Amber Aga as DI Hope Jonathan Harden as DI Miller Sam Crane as Dominic Knight Katherine Jack as Cressida McGuire George Turvey as Journalist