Casts
John Gregson
as Inspector Parnell
Alec Clunes
as Anthony Chester
Robert Shaw
as Marlowe
Helen Cherry
as Robbie
Betty McDowall
as Maggie Parnell
William Hartnell
as Freddie Maddox
Harry Fowler
as Smiley
Alan Wheatley
as Assistant Commissioner Bewley
Kenneth Cope
as Sergeant Grey
Ernest Clark
as Police Doctor
