When British Intelligence discovers that an Iron Curtain country is developing insects as weapons, they persuade eminent entomologist Frances Gray to infiltrate the country and collect specimens. Upon arrival, Frances's cover is almost immediately blown and her contact is murdered. The future looks grim for her—and perhaps for the world as well. Cast: - Margaret Lockwood as Frances Gray - Dane Clark as Bill Casey - Marius Goring as Commandant Anton Razinski - Naunton Wayne as Mr. Hedgerley - Wilfrid Hyde-White as Mr. Luke - Eugene Deckers as Alf - Olaf Pooley as Detective-Interrogator - Gladys Henson as Attendant - Paul Hardtmuth as Priest - Michael Hordern as Lab Director Owens - George Benson as Sandwich Stand Customer - Eric Pohlmann as Joe - Joan Haythorne as Judy - Patric Doonan as Customs Man - Anthony Newley as Operator Runtime: 88 minutes.