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