Mark Gatiss

Karakter: Ted Gilbert

Karakter: Angstrom

Karakter: NSA

Karakter: Ivor Montazac

Karakter: Donald

Karakter: Frank Renfield

Görev: Executive Producer

Karakter: Ronald Hall

Karakter: Giles Winslow

Karakter: Lord Marlborough

Karakter: Mycroft Holmes

Görev: Writer

Görev: Executive Producer

Karakter: Bamber Gascoigne

Karakter: Miss Blight (voice)

Karakter: Ping-Pong Player

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