Guest Stars Mark Ivanir as Alexander Goldfarb Daniel Ryan as DAC Peter Clarke Barry Sloane as DS Jim Dawson Temirlan Blaev as Young Anatoly Litvinenko Kirsten Foster as Jenny Hyatt Kayla Meikle as DC Deborah Maxwell Richard Pepper as DCI Duncan Ball Estella Daniels as Dr Onome George Sam Troughton as DI Brian Tarpey Marcus Onilude as Aidan Dan Skinner as James Cairns Ian Conningham as Dr Nick Gent Maggie Evans as Professor Pat Troop Sarah Naudi as Dr Justine Adams Rad Kaim as Andrey Lugovoy Aleksandar Mikic as Dmitry Kovtun Edward Baker-Duly as Martin Svennson Simon Paisley Day as Sir John Scarlett Antonio Magro as Mario Scaramella Kareem Alexander as Michael
