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.
1960
1986
2021
1956
1965
1981
1961
1999
1963
1959
2001
1941
1938
2007
1945
2008
2013