Holmes’s investigation into the missing naval treaty leads from Scotland Yard to the Halls of Parliament, where even the most respected names must be treated as suspects.

Meanwhile, Percy Phelps receives an unexpected visitor in the dead of night...with murderous intent. 

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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