Who was Britain's Ace of Spies? The truth is, nobody really knows. But the name he used was Sidney Reilly - and nobody did it better.

Vanessa Kirby follows Sidney on his dark and bloody path through the early 20th century, reckoning with oil barons, personal pride, and the rise of Communism. Could YOU survive decades on the edge? From SPYSCAPE, the home of secrets. A Cup And Nuzzle production. Sidney Reilly is voiced by Thomas Delacourt. Series producers: Gemma Newby, Joe Foley. Produced by Leo Hornak. Music by Nick Ryan.

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