A Spy Among Friends is a British espionage thriller television series, starring Guy Pearce and Damian Lewis. On Philby's betrayal and defection to Russia after being exposed as a Soviet double agent, British and American Intelligence was at stake. It is based on the book of the same name by Ben Macintyre, adapted by Alex Cary and directed by Nick Murphy. In England in 1963, Nicholas Elliott (Lewis) is working for SIS as an intelligence officer and is left in turmoil when he learns his close friend and colleague Kim Philby (Pearce) had been secretly working as a double agent for the KGB and has defected to the Soviet Union.