Basil Rathbone

Montague Hartley

Hugh Herbert

Mr. Penny

Broderick Crawford

Hubert A. Gilmore 'Gil' Smith

Bela Lugosi

Eduardo Vidos

Anne Gwynne

Elaine Winslow

Gladys Cooper

Myrna Hartley

Gale Sondergaard

Abigail Doone

Cecilia Loftus

Henrietta Winslow

Claire Dodd

Margaret Gordon

John Eldredge

Stanley Borden

Alan Ladd

Richard Hartley

Erville Alderson

Doctor Williams (uncredited)