• 
  Jacques Tourneur

  regizor

• 
  Charles Bennett

  scenarist

• 
  Dana Andrews

  Dr. John Holden
• 
  Peggy Cummins

  Joanna Harrington
• 
  Niall MacGinnis

  Dr. Julian Karswell
• 
  Maurice Denham

  Professor Henry Harrington
• 
  Charles Lloyd Pack

  Chemist
• 
  Liam Redmond

  Professor Mark O'Brien

• 
  Athene Seyler

  Mrs. Karswell
• 
  Michael Peake

  2nd Reporter
• 
  Reginald Beckwith

  Mr. Meek
• 
  Percy Herbert

  Farmer (deleted from US print)
• 
  Brian Wilde

  Rand Hobart
• 
  Peter Elliott

  Kumar
• 
  Rosamund Greenwood

  Mrs. Meek

• 
  Peter Hobbes

  Superintendent
• 
  Lloyd Lamble

  Detective Simmons
• 
  Richard Leech

  Inspector Mottram
• 
  Ewan Roberts

  Lloyd Williamson

• 
  M.R. James

  o poveste de