At the outbreak of WWII, the ancient gothic castle of Colditz was converted into a prisoner-of-war camp. Its location on a rocky spur overlooking a river made it the ideal location for a high-security prison, or so the Germans thought.

Sent to Colditz were some of the most difficult allied prisoners-of-war.

Made famous after the second world war in memoirs, films and TV, Colditz was known for its multiple escape attempts, some of great derring-do, others were feats of ingenuity and engineering.

In this episode, I'm joined by Ben Macintyre.

Ben is the bestselling author of books including Agent Sonya, SAS: Rogue Heroes, The Spy and the Traitor, Agent Zigzag, Operation Mincemeat and A Spy Among Friends. Ben's new book Prisoners of the Castle: An Epic Story of Survival and Escape from Colditz, the Nazis' Fortress Prison takes a new look at the Colditz and really fills out the story.

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