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