On screen
Cast
21 credited performers
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
Artwork unavailable
Piers Bishop
Jonathan Chester
Artwork unavailable
Frank Hawkins
Mr. Tamplin
Ray Smith
Mr. Briggs
Christopher Ellis
Christopher Parnell
Artwork unavailable
John Dunbar
Sgt. Henry
Artwork unavailable
Edward Rees
Desk Sergeant
Artwork unavailable
Robert Hunter
Desk Sergeant
Artwork unavailable
Anthony Ashdown
Constable Jackson
Alan Curtis
Inspector