Mark Gatiss

as Marshall

as Paul

as Simon

as Self

as Old Lord/Butler 'Smith'/Dancing Man/Old Lord 'Johnny'

as Ted Gilbert

as Gabriel Book(12 eps)

as Ted Gilbert (archive footage) (uncredited)

as Angstrom

as Self

as Frank Parris / Oscar Berlin(5 eps)

as Earl of Sandwich(1 ep)

as Earl of Sandwich (voice)(1 ep)

as Sir John Gielgud

as Isaac Newton(1 ep)

as Sherlock Holmes

as Self

as George(1 ep)

as NSA

as Larry Grayson(3 eps)

as Jacob Marley

as Self

as Sherlock Holmes(1 ep)

as Doctor MacLean

as Ivor Montazac

as Mr. Wickens

as Henry Huxley

as Self

as Mr Murphy

as Donald

as The Man

as Self

as Self

as Self

as Himself - Presenter

as Frank Renfield(3 eps)

as Himself

as Mr. Harmony(2 eps)

as Peter Mandelson (voice)

as Radio Announcer (voice)

as Lord Marlborough

as George III

as Multiple Characters

as Doctor(2 eps)

as Himself - Presenter

as Giles Winslow

as Ronald Hall

as The Captain

as Sir Robert Cecil(3 eps)

as Self - Narrator (voice)

as Dr. Landers

as Prince Regent(5 eps)

as Professor Robert Jan van Pelt

as Joel

as Billy Matlock

as Colonel Theakes

as Himself

as Mycroft Holmes

as Dettweiler

as Rich(1 ep)

as Himself

as Steven Crosswell

as Self

as Dr. Quentin Questa (voice)(1 ep)

as Peter Mandelson

as Stephen Gardiner(4 eps)

as Major Benjamin 'Benjy' Flint(3 eps)

as Self(1 ep)

as Self

as Himself - Narrator (voice)(4 eps)

as Callum(1 ep)

as Self(1 ep)

as Menenius Agrippa

as Himself / Mark Gatiss

as Self

as Presenter

as Self

as Joan Crawford(1 ep)

as Himself(5 eps)

as Narrator

as Self - Host

as Self

as Self - Actor and Writer

as Joan Crawford(1 ep)

as Mr Jackson

as Tycho Nestoris(4 eps)

as Henry Rackham Junior(4 eps)

as Cavor

as Self - Presenter(3 eps)

as Himself

as Mycroft Holmes(11 eps)

as Malcolm McLaren

as Himself

as Self(2 eps)

as Ernest Dunks

as Duff Purves

as Mr. Snow(2 eps)

as The Curator(3 eps)

as Colonel Black(6 eps)

as John Dashwood(2 eps)

as PC Butcher

as Robert Louis Stevenson(6 eps)

as Apsley Cherry-Garrard

as Himself(1 ep)

as (segment "Don't") (uncredited)

as Rat

as Hilary Briss / Mickey Michaels / Val Denton / Les McQueen / Lance Longthorne / Alvin Steele / Phil Proctor / Mrs Beasley / Mick McNamara / Neds / Lotte Lipp / Brian Morgan / Dr Chinnery / Iris Krell / Bobbin

as Bamber Gascoigne

as Johnnie Cradock

as Himself

as Ping-Pong Player

as Ambrose Chapfel(4 eps)

as Miss Blight (voice)

as Self - The League of Gentlemen

as Various Characters

as Additional Vogon Voices

as John Paterson

as Self

as Gantok(2 eps)

as Richard Lazarus(1 ep)

as Narrator(13 eps)

as Self(1 ep)

as Ronald Hawes(1 ep)

as Self(1 ep)

as Kenyon

as Terry Scanlon

as Self

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

as Jeremy

as Peter(1 ep)

as Glenn Bulb(10 eps)

as Self

as House Agent

as Self(1 ep)

as Viking (voice)

as Louis Aragon

as Teddy - Agent(1 ep)

as John Trant

as Self

as various

as Hang Man Chang(1 ep)

as Self(1 ep)

as Porter

as Mark

as Mr. Borusa

as The Doctor

as Agent(1 ep)

as Various(18 eps)

as Junior Detective(3 eps)

as Rev Giles Shawcross(1 ep)

as Mr. Emerson

as Self - Interviewer

as Georgie

as Mr Banham

as Bowmer(3 eps)

as Dr. William Bruffin

as Diner Manager(1 ep)

as Leonard Boynton(1 ep)

as Radio Presenter (Voice)(1 ep)