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 Sam Troughton as DI Brian Tarpey Marcus Onilude as Aidan Nikolai Tsankov as Boris Berezovsky Stephen Campbell Moore as Ben Emmerson QC Selina Cadell as Louise Christian Kevin Shen as Robin Tam QC Brian Protheroe as Sir Robert Owen Greg Kolpakchi as Oscar Enrique James Esler as Older Anatoly Litvinenko
