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 Kirsten Foster as Jenny Hyatt Kayla Meikle as DC Deborah Maxwell Temirlan Blaev as Young Anatoly Litvinenko Sam Troughton as DI Brian Tarpey Marcus Onilude as Aidan Nikolai Tsankov as Boris Berezovsky Selina Cadell as Louise Christian Stephen Campbell Moore as Ben Emmerson QC Brian Protheroe as Sir Robert Owen Kevin Shen as Robin Tam QC Greg Kolpakchi as Oscar Enrique James Esler as Older Anatoly Litvinenko
