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Synopsis:
The Soviets explode their first atomic bomb thanks to Maclean's undercover work in the United States, but the CIA are on his trail. Philby discovers the group have been compromised and is forced to sacrifice his old friend, who bids his family goodbye and flees to Russia - hotly pursued by British agents
Cast:
Tom Hollander as Guy Burgess, Rupert Penry-Jones as Donald Maclean, Samuel West as Anthony Blunt, Toby Stephens as Kim Philby

