Dr. Peterson
Group Captain (uncredited)
Brouhardier
John Dawson
The Dutchman
Clifton Conrad
Mr. Spratt
Mr. Morini
Bob's Father
Police Inspector
Richard Le Gallienne
Waiter
Dialogue Scientist at Conference (bit)
Professor Horvard
Heinrich
Richard Warner
the father
Mr. Charrington
Sheriff of Nottingham
Paul Dupont
John Wesley
Dr. Poldoi
