Director

Screenplay

George (1 episode)

Ted Gilbert

Gabriel Book (6 episodes)

Writer (6 episodes)

Creator

Angstrom

Frank Parris / Oscar Berlin (6 episodes)

Earl of Sandwich (1 episode)

Earl of Sandwich (voice) (1 episode)

Sir John Gielgud

Isaac Newton (1 episode)

Sherlock Holmes

Sherlock Holmes (1 episode)

Screenplay

Director

NSA

Larry Grayson (3 episodes)

Director

Writer

Jacob Marley

Adaptation

Doctor MacLean

Callum (1 episode)

Self (1 episode)

Ivor Montazac

Director

Screenplay

Mr. Wickens

Director

Writer

Henry Huxley

Mr Murphy

Donald

The Man

Frank Renfield (3 episodes)

Executive Producer (3 episodes)

Writer (3 episodes)

Creator

Executive Producer

Writer

Director

Mr. Harmony (2 episodes)

Peter Mandelson (voice)

Radio Announcer (voice)

Executive Producer

Writer

Director

Radio Presenter (Voice) (1 episode)

Director (2 episodes)

Writer (2 episodes)

Lord Marlborough

George III

Various Characters

Writer

Giles Winslow

Ronald Hall

The Captain

Sir Robert Cecil (3 episodes)

Dr. Quentin Questa (voice) (1 episode)

Director (8 episodes)

Writer (8 episodes)

Producer (8 episodes)

Dr. Landers

Prince Regent (5 episodes)

Professor Robert Jan van der Pelt

Joel

Billy Matlock

(1 episode)

Colonel Theakes

Himself

Mycroft Holmes

Writer

Executive Producer

Creator

Rich (1 episode)

Dettweiler

Self (1 episode)

Steven Crosswell

Peter Mandelson

Stephen Gardiner (4 episodes)

Major Benjamin 'Benjy' Flint (3 episodes)

Self (1 episode)

Tycho Nestoris (4 episodes)

Himself - Narrator (voice) (4 episodes)

Director

Writer

Writer

Writer

Executive Producer

Himself (5 episodes)

Narrator

(9 episodes)

Mr. Snow (2 episodes)

Mr Jackson

Henry Rackham Junior (4 episodes)

Cavor

Screenplay

Self - Presenter (3 episodes)

Writer (3 episodes)

Mycroft Holmes (11 episodes)

Writer (6 episodes)

Executive Producer (12 episodes)

Creator

Malcolm McLaren

Rev Giles Shawcross (1 episode)

Self (2 episodes)

Ernest Dunks

(1 episode)

Duff Purves

The Curator (3 episodes)

Writer (3 episodes)

Producer (3 episodes)

Creator

Colonel Black (6 episodes)

Leonard Boynton (1 episode)

Screenplay (3 episodes)

John Dashwood (2 episodes)

PC Butcher

Robert Louis Stevenson (6 episodes)

Apsley Cherry-Garrard

Writer

Co-Producer

Himself (1 episode)

Rat

Johnnie Cradock

Bamber Gascoigne

Ping-Pong Player

(4 episodes)

Miss Blight (voice)

Various Characters

Writer

Executive Producer

Self (1 episode)

Additional Vogon Voices

(3 episodes)

Narrator (13 episodes)

Gantok (2 episodes)

Richard Lazarus (1 episode)

Writer (9 episodes)

John Paterson

Ronald Hawes (1 episode)

Self (1 episode)

Kenyon

Terry Scanlon

Writer

Producer

Radio Presenter With 'Spaceship' Theory / Wildlife voiceover (voice) (uncredited)

Teddy - Agent (1 episode)

Peter (1 episode)

Jeremy

Glenn Bulb (12 episodes)

(1 episode)

House Agent

Viking (voice)

Louis Aragon

John Trant

Hang Man Chang (1 episode)

Porter

Agent (1 episode)

Various

Writer

(1 episode)

Writer (1 episode)

The Doctor

Writer

Mr. Borusa

Writer

Mark

Writer

Various (18 episodes)

Writer (18 episodes)

Creator

Junior Detective (3 episodes)

(18 episodes)

Writer

Mr. Emerson

Writer

Georgie

Writer

Mr Banham

Director

Bowmer (3 episodes)

Dr. William Bruffin

Writer

Diner Manager (1 episode)