In this classic episode of True Spies, Vanessa Kirby meets a spy who infiltrated the political wing of the Irish Republican movement. Willie Carlin risked his life in Derry, Northern Ireland, on a daily basis to provide the UK with intelligence.

From SPYSCAPE, the home of secrets and skills. A Cup And Nuzzle production. Series producer: Gemma Newby. Produced by Joe Foley. Music by Nick Ryan

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