| Director | John Gilling |
|---|
Scientist Dr Morley and his American associate Jack Costain detect a meteorite heading to Earth. After determining where the meteorite has crashed, they and their aides investigate a meteorite in the British countryside, discovering that it is an alien device from Ganymede, a moon of Jupiter. The device is in the shape of a small sphere.
While working nights at the lab, secretary Ann Barlow sees something moving in the lab. Dr Morley attempts to communicate with the creature, but he is killed. When the creature escapes the lab, Costain begins to track it.
Shortly thereafter, teenage girls begin to go missing after answering an advertisement in Bikini Girl magazine. It turns out the alien wants to use women from Earth for breeding.