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. Plot A Scotland Yard inspector is called to investigate a series of unsolved robberies. Inspector Cooper-Smith (Stewart Granger) arrives at the country manor of a respectable English family. He discovers Livia Emberday (Cathleen Nesbitt), the mistress of the house, has turned to crime in order to bolster the family's flagging fortunes. With assistance from an order of bogus nuns, stolen goods end up in the warehouse of Hamlyn (Robert Morley), purportedly a respectable businessman. Cast Stewart Granger as Superintendent Cooper-Smith Susan Hampshire as Trudy Emberday Robert Morley as Hubert Hamlyn Cathleen Nesbitt as Livia Emberday Brigitte Horney as Sister General Sophie Hardy as Sophie Diane Clare as Clare O'Connor (Sister Clare) James Robertson Justice as Sir John (voice: English version) Siegfried Schürenberg as Sir John – German Version Eddi Arent as Emil Clossen James Culliford as Luke Emberday Allan Cuthbertson as Detective Thompson Colin Gordon as Dice Caroline Blakiston as White Nun Richardina Jackson as Black Nun Release The film premiered in West Germany on 16 December 1966. Critical reception The Radio Times called it a "farcical British crime drama"; Variety noted, "a complicated Scotland Yard whodunit which the spectator will find taxing to follow...Script is pocketed with story loopholes and attempts to confuse, plus certain motivations and bits of business impossible to fathom. Granger still makes a good impression"; while Allmovie wrote, "there are plenty of twists in the storyline of this often complex mystery feature." Cast member Susan Hampshire called the film "another B picture. Very often I did films because of tax demands" and said Stewart Granger had a big ego, but felt "we had a very interesting director in that film, Cyril Frankley, and I think it was one of the best acting performances I've ever given." Soundtrack The soundtrack composed by Peter Thomas was released in 1968 on a library LP (production music) "Jazz Graphics / The Spy Set" - KPM 1042 without any reference to the film. The LP is currently available as Online release - again without