• 
  Mario Zampi

  regizor

• 
  Christopher Lee

  Russian Agent
• 
  Terence Alexander

  rol minor
• 
  Charles Goldner

  Gaston
• 
  Ronnie Stevens

  Aubrey
• 
  George Cole (I)

  George Potts
• 
  Irene Handl

  Mrs. Tidmarsh
• 
  Victor Maddern

  rol minor

• 
  Frederick Valk

  Rakov
• 
  Gibb McLaughlin

  Schoolmaster
• 
  Martin Boddey

  rol minor
• 
  Eleanor Summerfield

  Cecilia
• 
  Wilfrid Hyde-White

  Sir Hubert Wells
• 
  Oskar Homolka

  Zekov
• 
  Kynaston Reeves

  Barworth Director

• 
  Ronald Adam

  Barworth Controller
• 
  Richard Wattis

  Barnes
• 
  Friedrich Berger

  rol minor
• 
  Michael Medwin

  Smedley
• 
  Willoughby Gray

  rol minor
• 
  Olaf Pooley

  Professor Roblettski
• 
  Richard Marner

  rol minor
• 
  Terry Alexander

  rol minor
• 
  Reed De Rouen

  rol minor

• 
  Stanley Pavey

  imagine
• 
  Mario Zampi

  producător
• 
  Jack Davies (I)

  scriitor
• 
  Michael Pertwee

  scriitor