On a stormy night in 1886, two bodies were found floating in a shallow Bavarian lake: a psychiatrist with strangulation marks, and the recently deposed king, whose watch had stopped at 6:54. The official ruling was suicide, but a strong swimmer in waist-deep water with no water in his lungs doesn't add up.

This episode investigates King Ludwig II of Bavaria, the Swan King whose Neuschwanstein castle inspired Disney. We trace a teenage monarch crushed by geopolitics, his obsessive patronage of Wagner, the fantasy worlds he built with futuristic technology, and the legally questionable coup that ended in his mysterious death.

• How an 18-year-old unprepared for statecraft saved Wagner's career with a blank check
• The secret Welfenfonds slush fund Bismarck used to bribe Ludwig into giving up Bavaria's political power
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