The mysterious ‘rat’ falls into Sherlock’s trap.  But what will the great detective do with him, once he’s solved the murder of Charles McCarthy?  A Noiser podcast production.    Narrated by Hugh Bonneville   Written by Sir Arthur Conan Doyle  Produced by Duncan Barrett  Sound Design and Audio Editing by Tony Onuchukwu  Sound Supervisor: Tom Pink  Compositions: Dorry Macaulay and Oliver Baines  Mix & Mastering: Josh Latham   Series Consultant: Dan Smith  Executive Producer: Katrina Hughes    For ad-free listening and early access to new episodes, join Noiser+. Just click the subscription banner at the top of the feed to get started. Or go to noiser.com/subscriptions  Learn more about your ad choices. Visit podcastchoices.com/adchoices