The Trygon Factor

A Scotland Yard detective is investigating a string of robberies and a murder, and the information he uncovers leads him to the estate of a wealthy but strange English family, who share their mansion with a group of nuns. The detective comes to suspect that neither the family nor the nuns is quite what they seem to be.

• Cyril FrankelDirector
• Derry QuinnScreenplay
• Stanley MunroScreenplay
• Peter ThomasOriginal Music Composer

• Stewart GrangerSuperintendent Cooper Smith
• Susan HampshireTrudy Emberday
• Cathleen NesbittLivia Emberday
• James CullifordLuke Emberday
• Brigitte HorneyOberin
• Robert MorleyHubert Hamlyn
• Sophie HardySophie
• Colin GordonDice
• Eddi ArentClossen
• Diane ClareClare
• Allan CuthbertsonDet. Thompson
• Caroline BlakistonNun