The Trygon Factor

1969 • 88 phút

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The Trygon Factor is a 1966 British-West German crime film directed by Cyril Frankel and starring Stewart Granger, Susan Hampshire and Robert Morley. It is one of the films based on works by Edgar Wallace of the 1960s and its German title is Das Geheimnis der weißen Nonne/ Mystery of the White Nun.
The film is based on the 1917 Edgar Wallace novel Kate Plus Ten.