Basil Rathbone

Sherlock Holmes

Nigel Bruce

Dr. John Watson

Aubrey Mather

Alastair

Paul Cavanagh

Simon Merrivale

Dennis Hoey

Inspector Lestrade

Harry Cording

John Simpson

Holmes Herbert

Alan Cosgrave

Sally Shepherd

Mrs. Monteith

Gavin Muir

Chalmers

Florette Hillier

Alison MacGregor

David Clyde

Alex MacGregor

Doris Lloyd

Bessie

Cyril Delevanti

Stanley Raeburn (uncredited)

Alec Craig

Angus (uncredited)

Richard Alexander

Ralph King (uncredited)

Bobby Hale

Pub Patron (uncredited)

John B. Goodman

Art Direction

Roy William Neill

Director

Eugène Lourié

Art Direction

Virgil Miller

Director of Photography

Saul A. Goodkind

Editor

Roy Chanslor

Screenplay

Roy William Neill

Producer

Paul Sawtell

Original Music Composer

Arthur Conan Doyle

Novel