On screen
Cast
12 credited performers
Noah Beery
Felix Marl
Hugh Wakefield
Derek Yale
Alfred Drayton
Insp. Parr
Niall MacGinnis
Jack Beardmore
June Duprez
Sylvia Hammond
Artwork unavailable
Paul Blake
Sgt. Webster
Basil Gill
James Beardmore
Gordon McLeod
Brabazon
Renee Gadd
Millie Macroy
Ralph Truman
Lawrence Fuller
Robert Rendel
Commissioner
William Hartnell
Character not listed