All Cast
Emrys Jones
Robert Matthews / John Barlow
Zena Marshall
Ann Farrington
John Horsley
Inspector Clements
Joan Hickson
Mrs. Fenton
Hector Ross
Canning
Roger Maxwell
Col. Hector Smythe
Marne Maitland
Heinz
Ian Fleming
Dr. Wilson
Frederick Piper
Thomas Pritchard
George Pastell
Ferrari
Lesley Deane
Mrs. Smythe