A man is murdered in a room with no windows and a steel lined door which locks only from the inside.
as Superintendent Meredith
as Lexman
as Ramon Karadis
as Grace
as Linda Buckland
as Sergeant Anson
as Commissioner of Police
as Fisher
as Manservant
as Jock
as Sergeant Butterfield
as Landlady
as Finch
as Viney
as Amis
as Brennan
as Secretary (C.I.D.)
