Sherlock Holmes

Basil Rathbone

Acting

Doctor Watson

Nigel Bruce

Acting

Potts / Tanner / Ramson

Gerald Hamer

Acting

Lord Penrose

Paul Cavanagh

Acting

Emile Journet

Arthur Hohl

Acting

Judge Brisson

Miles Mander

Acting

Marie Journet

Kay Harding

Acting

Police Sergeant Thompson

David Clyde

Acting

Drake

Ian Wolfe

Acting

Nora

Victoria Horne

Acting

Attendant (uncredited)

Al Ferguson

Acting

Hotel Day Desk Clerk (uncredited)

Olaf Hytten

Acting

Villager in Pub (uncredited)

Bobby Hale

Acting

Harry Allen

Acting

Gertrude Astor

Acting

Clyde Fillmore

Acting

Charles Francis

Acting

George Kirby

Acting

Pietro Sosso

Acting