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Illustration for the riddle “Betrayed by a Detail”

The telling detail · ★★☆

Betrayed by a Detail

During the Second World War, a superbly trained German spy with flawless English presents himself at an American border post as a citizen coming home. He fills in the form in a clean hand, not one misspelling, not one crossing-out, and is arrested on the spot. What gave him away?

The solution

Uncover this answer in Post Mortem. In the app, the narrator answers your questions as you piece together the story.

Available on Google Play and the App Store.

Where do you start?

Read the scene again and separate the facts from your assumptions. With a narrator who knows the answer, ask one question at a time. They answer yes, no or irrelevant.