1. Real Frankenstein, Mummy Curse, Man in the Iron Mask

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. 19 January 2014. 43 min

We visit an iconic German castle that was the site of a gruesome 17th century science experiment, tour the ancestral home of an English aristocrat struck down by an ancient curse, and inspect an isolated French fortress.

2. Crown Jewels Heist; Marquis De Sade; Enigma of Kaspar Hauser

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. 26 January 2014. 42 min

We tour England's iconic Tower of London; explore an impenetrable bastion in the South of France where a controversial literary giant was jailed; and visit an ancient German castle that may hold a centuries-old secret.

3. Hound of the Baskervilles; Lord Gordon-Gordon; Escape from Colditz

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. 9 February 2014. 42 min

Visit a British manor house that inspired the creepy masterpiece, tour a sprawling New York mansion that belonged to a Gilded Age robber baron and explore a German castle that served as a prisoner-of-war camp in World War II.

4. The Tichborne Claimant; Washington Resurrection; Loch Ness Hoax

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. 16 February 2014. 42 min

We explore an English country estate that was at the heart of a bizarre inheritance dispute, tour a colonial mansion in Virginia to understand a grisly medical experiment, and visit the ruins of a Scottish castle.

5. The Black Dinner; Voynich Manuscript; Seward Attack

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. 23 February 2014. 42 min

We visit a giant fortress in Scotland where a 15th century power struggle climaxed, explore an Italian villa that housed a mysterious manuscript, and tour a upstate New York mansion