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.
1948
1954
1965
1943
1975
1990
1967
1979
2001
2020
1955
1950
2021
2022
2011
2018
1960
1939
1988