John Gregson
Inspector Parnell
Alec Clunes
Anthony Chester
Robert Shaw
Marlowe
Helen Cherry
Robbie
Betty McDowall
Maggie Parnell
William Hartnell
Freddie Maddox
Harry Fowler
Smiley
Alan Wheatley
Assistant Commissioner Bewley
Kenneth Cope
Sergeant Grey
Ernest Clark
Police Doctor
Noel Howlett
Brain Specialist
Renée Houston
Masie Maddox
Piers Bishop
Jonathan Chester
Frank Hawkins
Mr. Tamplin
