The Russian: An old British traitor is called on to infiltrate a Russian firm suspected of stealing secrets from GCHQ.
Regular Cast: Peter Firth (Harry Pearce), Rupert Penry-Jones (Adam Carter), Nicola Walker (Ruth Evershed), Anna Chancellor (Juliet Shaw), Raza Jaffrey (Zafar Younis), Hugh Simon (Malcolm Wynn-Jones)
Guest Cast: Miranda Raison (Jo Portman), Olga Sosnovska (Fiona Carter), David Fleeshman, Janet Amsden, George Baker, David Burke, James Dicker, Jane Lowe, Ben Daniels, Jo McInnes, Phyllis Logan, William Oxborrow
Writer: Howard Brenton / Director: Omar Madha
Airdate: 27 Oct 2005 on BBC One
Series: Spooks Season 4 Episode 8
Show Info: The cases of a group of MI5 officers based at the service’s Thames House headquarters, in a highly secure suite of offices known as The Grid.