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.
1943
2019
1972
1932
1931
2001
1967
1962
1963
2005
1951
1970
1976
1941
1936
1999
2024
1942
1992
1938