"Drummond's wedding with Phyllis is interrupted when the inspector guarding their gifts is killed. He tries to trace the killers and uncovers the mystery of diamond counterfeiters."
John Barrymore
as Colonel Neilson
John Howard
as Captain Hugh 'Bulldog' Drummond
Louise Campbell
as Phyllis Clavering
Reginald Denny
as Algy Longworth
E. E. Clive
as Tenny
Porter Hall
as Dr. Botulian
Elizabeth Patterson
as Aunt Blanche
Nydia Westman
as Gwen Longworth
Halliwell Hobbes
as Prof. Bernard Goodman
Matthew Boulton
as Sir Raymond Blantyre
Zeffie Tilbury
as Mrs. Weevens
David Clyde
as Constable McThane
Clyde Cook
as Constable Sacker
Austin Fairman
as Roberts
Michael Brooke
as Anthony Greer
Georgette Rhodes
as Paulette
Gregory Gaye
as Raoul
Jimmy Aubrey
as Mechanic
Frank Baker
as Constable Announcer
Frank Benson
as Villager
William Haade
as Botulian's Driver
Forrester Harvey
as Bus Garage Man
Andre Marsaudon
as Footman
Torben Meyer
as Hoffman
Albert Petit
as Train Official
Albert Pollet
as Radio Dispatcher
John Sutton
as Doctor
Maude Fealy
as Spinster
Margaret Fealy
Peter Bronte
as Messenger
Charles De Ravenne
James P. Burtis
as Sergeant
Evan Thomas
as Constable
David Dunbar
Douglas Gordon
Pat X. Kerry
as First Expressman
David Thursby
as Second Expressman
Stuart Palmer
Screenplay
James P. Hogan
Director
Herman C. McNeile
Novel
Stuart Walker
Associate Producer
Robert Odell
Art Direction
Edward Dmytryk
Editor
Charles Hisserich
Sound Recordist
Richard Olson
Boris Morros
Music Director
Hans Dreier
Harry Fischbeck
Director of Photography
Richard Harlan
Assistant Director
A. E. Freudeman
Interior Designer
Adolph Zukor
Presenter