As days pass without progress, the threat of war looms ever closer. Luckily, a curiously placed blood stain on a carpet in the murdered spy’s house leads Holmes to a revelation. But when the great detective finally unmasks the thief, he must choose between the truth and mercy.

A Noiser podcast production.

Narrated by Hugh Bonneville 

Written by Sir Arthur Conan Doyle

Produced by Katrina Hughes and Addison Nugent

Sound Design and Audio Editing by Josh Latham

Compositions: Dorry Macaulay and Oliver Baines

Mix & Mastering: Liam Cameron

Series Consultant: Dan Smith

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