The Nazis. The Allies. A washed-up corpse. On a palmy, sleepy Spanish beach. Top secret bogus documents. Ultra decrypts.

If you’ve never heard of this hard-to-believe tale of British MI5 and Royal Navy deception that ultimately played Hitler’s boys like a fiddle, well, buckle up and hit “play” below. You might just poop your trousers.

(The featured photograph is that of MI5 clerk Nancy Jean Leslie, who played the love interest of fictitious dead Royal Marine Major Bill Martin — the beached body with the secrets)