• 
  Ian Bannen

  Workman, Hit and Run Victim.
• 
  Jack Hawkins

  Supt Tom Halliday
• 
  Fred Griffiths

  Barman.
• 
  George Rose

  Slob, the informer
• 
  John Welsh

  Shepperton Real Estate Agent
• 
  Dorothy Alison

  Mary Halliday
• 
  Alec McCowen

  Hospital Doctor
• 
  John Warwick

  Detective at Shipping Office

• 
  Geoffrey Keen

  Chief Superintendant Malcolm
• 
  Sydney Tafler

  Mr. Stone
• 
  Harold Goodwin

  Somerset House official
• 
  Meredith Edwards

  Thomas, garage owner
• 
  Newton Blick

  Detective Commander Harris
• 
  Peter Burton

  Mr. Creasey
• 
  William Mervyn

  Manager of the Royal Festival Hall

• 
  Stratford Johns

  Constable