The idealism of youth is a powerful thing. But when you're part of a movement, can you ever be sure of who's really pulling the strings? In the 1950s and 60s, a hidden hand is manipulating members of the National Student Association. But a change is going to come - and someone is bound to blow the whistle. Sophia Di Martino joins Professor Hugh Wilford to uncover the CIA's controversial involvement in student activism in the 20th century. From SPYSCAPE, the home of secrets. A Cup And Nuzzle production. Series producers: Gemma Newby, Joe Foley. Produced by Morgan Childs. Music by Nick Ryan.