Sir John Gielgud
Doctor Maclean
Ivor Montazac
Mr. Wickens
Henry Huxley
Mr Murphy
Donald
The Man
Himself - Presenter
Peter Mandelson (voice)
Radio Announcer (voice)
Lord Marlborough
Himself - Presenter
Giles Winslow
Ronald Hall
The Captain
Narrator
Dr. Landers
Professor Robert Jan van der Pelt
Billy Matlock
Colonel Theakes
Mycroft Holmes
Dettweiler
Steven Crosswell
Himself
Peter Mandelson
Menenius Agrippa
Himself / Mark Gatiss
Presenter
Self - Host
Self - Actor and Writer
Mr Jackson
Malcolm McLaren
Himself
Ernest Dunks
PC Butcher
Apsley Cherry-Garrard
(segment "Don't") (uncredited)
Roddy McDowel
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
Johnnie Cradock
Bamber Gascoigne
Jakki (voice)
Himself
Ping-Pong Player
Miss Blight (voice)
Various Characters
Additional Vogon Voices (as League of Gentlemen)
John Paterson
Terry Scanlon
Radio Presenter With 'Spaceship' Theory / Wildlife voiceover (voice) (uncredited)
Himself
House Agent
Louis Aragon
John Trant
Porter
The Doctor
Mr. Borusa
Mr. Emerson
Interviewer
Georgie
Dr. William Bruffin
