Unmasking the Cambridge Five spies

The Cambridge Five have gone down in history as the most notorious spies of the 20th century. For seventeen years, Guy Burgess, Kim Philby, Anthony Blunt, Donald Maclean and John Cairncross got away with leaking top-secret British intelligence to the Soviet Union with disastrous consequences. Now a new book, drawing on recently declassified files, debunks some enduring myths about them.

• Guest: Antonia Senior, author of Stalin's Apostles: The Cambridge Five and the Making of the Soviet Empire 

• Producer: Julie Street