Watch Sworn to Secrecy: Secrets of War Season 1 Episode 6 Online
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- COUNTRIES: United States of America,South Korea,United Kingdom,France,Germany,Russia,Vietnam
- Subtitles: English
They were five disillusioned young men studying at Cambridge University in the 1930’s when they were secretly recruited by Soviet agents. They went on to become the most successful spies of the 20th century, penetrating both American and British governments at the highest levels.