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