Sherlock Holmes

Basil Rathbone

Acting

Doctor Watson

Nigel Bruce

Acting

Kitty

Evelyn Ankers

Acting

Sir Evan Barham

Reginald Denny

Acting

R.F. Meade

Thomas Gomez

Acting

Sir Anthony Lloyd

Henry Daniell

Acting

General Jerome Lawford

Montagu Love

Acting

Admiral Sir John Fabian Prentiss

Olaf Hytten

Acting

Captain Roland Shore

Leyland Hodgson

Acting

Mrs. Hudson

Mary Gordon

Acting

Jill Grandis

Hillary Brooke

Acting

Camberwell

Harry Cording

Acting

Smithson - Barham's Butler (uncredited)

Herbert Evans

Acting

Meade's Henchman (uncredited)

Fred Graham

Acting

BBC Radio Announcer (voice) (uncredited)

Gavin Muir

Acting

Voice of Terror (voice) (uncredited)

Edgar Barrier

Acting

Bar Patron (uncredited)

Bobby Hale

Acting