By Emily Jane Thompson • March 1, 2026 • Share
Meet Ferdinand Demara, the “Great Impostor.”
Most con men steal money. Ferdinand stole lives. All because he was bored.
Over his career, he impersonated a monk, a prison warden, a philosophy professor, and a civil engineer.
But his most insane con happened during the Korean War.
He stole the credentials of a doctor named Joseph Cyr and joined the Canadian Navy as the ship’s surgeon.
He had zero medical training.
Everything was fine until 16 soldiers were brought on board with critical combat wounds.
They needed immediate surgery, or they would die.
Ferdinand didn’t panic. He told the nurses to prep the patients, then he ran to his cabin.
He cracked open a medical textbook, speed-read the chapter on chest surgery, and memorized the diagrams thanks to his near-photographic memory.
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