England, at the start of World War Two. Mysterious wireless broadcasts, apparently from Nazi Germany are heard over the BBC. They warn of acts of terror in England, just before they take place. Baffled, the Defense Committee call in Sherlock Holmes.
Basil Rathbone
as Sherlock Holmes
Nigel Bruce
as Doctor Watson
Evelyn Ankers
as Kitty
Reginald Denny
as Sir Evan Barham
Thomas Gomez
as R.F. Meade
Henry Daniell
as Sir Anthony Lloyd
Montagu Love
as General Jerome Lawford
Olaf Hytten
as Admiral Sir John Fabian Prentiss
Leyland Hodgson
as Captain Roland Shore
Mary Gordon
as Mrs. Hudson
Hillary Brooke
as Jill Grandis
Harry Cording
as Camberwell
