27th Day, The (1957)
This quite extraordinary anti-communist tract masquerades as naive science fiction.
An alien gives five people from five different countries a box of capsules capable of destroying life on their continent if opened.
The capsules become harmless after 27 days or on the owner's death. Suicide or destruction is the choice until the Russian emissary is ordered to annihilate the western world.
Professor Klaus Bechner
Dr Karl Neuhaus