British aristocrat Donald Maclean, as a member of the Cambridge 5, worked his way to the top of the British Foreign Office while secretly working as KGB spy. His wife was in on it the whole time. How did an extremely wealthy and noticeable couple successfully spy for so long, and why? Learn about their backgrounds, deeds, and fates. This is the fourth episode to deal with the Cambridge 5. The other episodes are: Episode 7: Secret Agent Super Spy: Harold Kim Philby: The 1st in a series on the Cambridge 5, Episode 10: Kim Philby Part 2: I Really Must Be Going; The second episode on our series on the Cambridge 5, & Episode 11: Guy Burgess: I Gotta Be Me! This is the third episode in our series on the Cambridge 5. (First 2 are episodes 7 & 10)