Sherlock Holmes
Basil Rathbone
Doctor Watson
Nigel Bruce
Attendant (uncredited)
Al Ferguson
Hotel Day Desk Clerk (uncredited)
Olaf Hytten
Villager in Pub (uncredited)
Bobby Hale
Harry Allen
Gertrude Astor
Clyde Fillmore
Charles Francis
George Kirby
Pietro Sosso
Potts / Tanner / Ramson
Gerald Hamer
Lord Penrose
Paul Cavanagh
Emile Journet
Arthur Hohl
Judge Brisson
Miles Mander
Marie Journet
Kay Harding
Police Sergeant Thompson
David Clyde
Drake
Ian Wolfe
Nora
Victoria Horne
Characters
Arthur Conan Doyle
Producer
Roy William Neill
Director
Screenplay
Edmund L. Hartmann
Story
Brenda Weisberg
Editor
Paul Landres
Art Direction
John B. Goodman
Paul Gangelin
Original Music Composer
Paul Sawtell
Ralph M. DeLacy
Director of Photography
George Robinson