Guest Stars Barry Sloane as DS Jim Dawson Daniel Ryan as DAC Peter Clarke Mark Ivanir as Alexander Goldfarb Temirlan Blaev as Young Anatoly Litvinenko Kayla Meikle as DC Deborah Maxwell Kirsten Foster as Jenny Hyatt Richard Pepper as DCI Duncan Ball 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 Brian Protheroe as Sir Robert Owen Kevin Shen as Robin Tam QC Greg Kolpakchi as Oscar Enrique James Esler as Older Anatoly Litvinenko
