Listen to the programmes from the Radio 4 Extra season.
The on-air team's undercover investigators are on the trail of the 'Fifth Man'.
Ex-head of MI5 Stella Rimmington explains the impact on her of Burgess, Maclean and others
Spies pursued - Rick Gekoski attempts to track down diaries and effects of Kim Philby.
Sue MacGregor reunites five star pupils of the former spy Anthony Blunt.
George Blake's daring defection made headlines. But what of life behind the Iron Curtain?
Sir Anthony Blunt considers his life and the shame of his exposure.
The schooldays of young Guy Bennett could well have a major impact on his adulthood.
Spies in decline - what did the agent say to the actress? Burgess meets Coral Browne.
Guy Burgess according to people who knew and worked with him, including brother Nigel.