• 
  Don Sharp

  regizor

• 
  Michael Robson

  scenarist

• 
  Robert Powell

  Richard Hannay
• 
  David Warner

  Appleton
• 
  Karen Dotrice

  Alex Mackenzie
• 
  Ronald Pickup

  Bayliss
• 
  Paul Jerrico

  P.C. Scott
• 
  Paul McDowell

  McLean

• 
  John Welsh

  Lord Bethane
• 
  Timothy West

  Porton
• 
  William Squire

  Harkness
• 
  Robert Flemyng

  Magistrate
• 
  Andrew Keir

  Lord R
• 
  Eric Porter

  Chief Supt Lomas
• 
  John Mills

  Scudder

• 
  Miles Anderson

  David Hamilton
• 
  George Baker

  Sir Walter Bullivant
• 
  George Baker

  Sir Walter Bullivant
• 
  David Collings

  Tillotson
• 
  Donald Pickering

  Marshall