Various Characters
Mr Jackson
Georgie
Jacob Marley
Presenter
Himself - Presenter
Steven Crosswell
Menenius Agrippa
Kenyon
The Man
The Captain
Mr Banham
Self
Narrator
Himself
Self - Actor and Writer
Sherlock Holmes
Himself / Mark Gatiss
various
Mycroft Holmes
Gabriel Book
Sherlock Holmes
Frank Parris / Oscar Berlin
George
Larry Grayson
Himself
Earl of Sandwich (voice)
Isaac Newton
Frank Renfield
Doctor
Sir Robert Cecil
Mr. Harmony
Self
Major Benjamin 'Benjy' Flint
Junior Detective
Prince Regent
Rich
Himself - Narrator (voice)
Dr. Quentin Questa (voice)
Self
