Basil Rathbone

Sherlock Holmes

Nigel Bruce

Dr. Watson

Ida Lupino

Ann Brandon

Alan Marshal

Jerrold Hunter

Terry Kilburn

Billy

George Zucco

Professor Moriarty

Henry Stephenson

Sir Ronald Ramsgate

E. E. Clive

Inspector Bristol

Arthur Hohl

Henchman Bassick

May Beatty

Mrs. Jameson, Brandon Housekeeper

Peter Willes

Lloyd Brandon

Mary Gordon

Mrs. Hudson

Holmes Herbert

Justice of the Court

George Regas

Henchman Mateo

Mary Forbes

Lady Conyngham

Frank Dawson

Dawes, Moriarty's servant

William Austin

Inquisitive Stranger

Anthony Kemble-Cooper

Tony Conyngham

Leonard Mudie

Barrows - Moriarty's Attorney (uncredited)

Robert Nobel

Foreman of the Jury (uncredited)

Ivan F. Simpson

Gates - Trial Prosecutor (uncredited)

Neil Fitzgerald

Clerk of the Court (uncredited)

Frank Baker

Tompkins (uncredited)

Denis Greene

Denis Green (uncredited)

Robert Cory

Tower Sentry (uncredited)

Gordon Hart

Guard (uncredited)

Keith Hitchcock

Constable (uncredited)

Ivo Henderson

Bobby (uncredited)

Leyland Hodgson

Bobby (uncredited)

Boyd Irwin

Bobby (uncredited)

Charles Irwin

Marine Sergeant (uncredited)

Robert R. Stephenson

Cabby (uncredited)

Harry Cording

Second Fake Constable (uncredited)

Eric Wilton

Conyngham Butler (uncredited)

Frank Benson

Cockney (uncredited)

Ted Billings

Pub Customer (uncredited)

Herbert Evans

Scotland Yard Man (uncredited)