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.
2016
1941
2022
1922
1954
1921
1960
1929
1950
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1999
1977
1997
1935
1946
2003
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2020
1978
1969