Colonel Nielson
Captain Hugh C. 'Bulldog' Drummond
Phyllis Clavering
Algy Longworth
Tenny
Dr. Max Botulian
Aunt Blanche Clavering
Gwen Longworth
Anthony Greer
Professor Bernard Goodman
Sir Raymond Blantyree
Mrs. Weevens
Constable McThane
Constable Sacker
Roberts
Mechanic (uncredited)
Constable Announcer (uncredited)
Villager (uncredited)
Detective (uncredited)
Messenger (uncredited)
Sergeant (uncredited)
Minor Role (uncredited)
Constable (uncredited)
Spinster (uncredited)
Raoul (uncredited)
Botulian's Driver (uncredited)
Wedding Guest (uncredited)
Bus Garage Man (uncredited)
First Expressman (uncredited)
Footman (uncredited)
Hoffman (uncredited)
Train Official (uncredited)
Radio Dispatcher (uncredited)
Paulette (uncredited)
Doctor (uncredited)
Second Expressman (uncredited)