Guest Stars Barry Sloane as DS Jim Dawson Mark Ivanir as Alexander Goldfarb Daniel Ryan as DAC Peter Clarke Kayla Meikle as DC Deborah Maxwell Kirsten Foster as Jenny Hyatt Temirlan Blaev as Young Anatoly Litvinenko Richard Pepper as DCI Duncan Ball Sam Troughton as DI Brian Tarpey Estella Daniels as Dr Onome George Marcus Onilude as Aidan Rad Kaim as Andrey Lugovoy Sarah Naudi as Dr Justine Adams Maggie Evans as Professor Pat Troop Dan Skinner as James Cairns Ian Conningham as Dr Nick Gent 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
