as Baron de la Ma de la Toulon (uncredited)
as Compton - Cynthia's First Man (uncredited)
as Dr. Carthwright
as Dr. Bert Dilling
as Sir Edgar Whipsnade
as Lt. Meyerdorf
as Sergeant (uncredited)
as Cyril
as Sir William Drayton
as Maj. MacStreet
as Roy Lucas
as Clayton Palmer
as Calender
