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.
2009
2019
2005
1968
1992
2001
1951
1933
1981
1961
1943
2023
2022
1954
1991
1975
1985
2000