Basil Rathbone, Nigel Bruce, Evelyn Ankers, Reginald Denny, Thomas Gomez, Henry Daniell, Montagu Love, Olaf Hytten, Leyland Hodgson, Mary Gordon, Hillary Brooke, Harry Cording, Herbert Evans, Fred Graham, Gavin Muir
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.
This time, our detective duo are brought in to help the solve an intriguing wartime mystery. A voice on the radio is announcing details of an impending disaster, and the "Inner Council" led by Reginald Denny's "Sir Evan" is desperate to thwart these ruthless and effective acts of sabotage. To that end, they enlist the help of the courageous "Kitty" (Evelyn Anders) and the street rats of London to ...