Summary: When British Intelligence discovers that an Iron Curtian country is developing insects as weapons they persuade eminent entomologist Frances Gray to get into the country to collect some specimens. On arrival her cover is almost immediately blown and her contact murdered. The future looks grim for her and also perhaps for the world. (imdb)

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Genres: Suspense/Thriller, Action

Country: UK

Directed By: Roy Ward Baker

Written By: Eric Ambler

Starring: Marius Goring, Margaret Lockwood, Wilfrid Hyde-White, Dane Clark, Naunton Wayne, Eugene Deckers

More information at the Internet Movie Database