| Director | Jean Girault, Norman J. Warren |
|---|---|
| Genre | science fiction film |
| Country | United Kingdom |
| Budget | £350,000 |
Aliens from Betelgeuse crash-land on Earth in their malfunctioning cargo ship. Their arrival draws the attention of four sexually frustrated humans in a nearby park: Oliver and Prudence (a mild-mannered professional and his highly-strung fiancée), Willy (a bumbling young shop assistant) and Cliff (a middle-aged man walking his dog). The quartet wander into the ship and encounter its all-female crew: engineer Partha, nurse Cosia and the captain, known as Skipper. Willy inadvertently drops some pornographic magazines that he has just bought. The aliens mistake a herd of approaching cows for an attacking force and hurriedly take off despite the computer's warnings about the fragile state of the ship's systems.
Resuming their original course, the aliens study their guests in detail. Fascinated by the anatomy of the males, they decide to sell them to a zoo for exotic life forms on a distant planet. They also debate the significance of the acts depicted in Willy's magazines. Partha is particularly keen to emulate them and enthusiastically has sex with Cliff. However, Cliff soon regrets this as he physically cannot keep up with the energetic Partha, who has gained an extreme liking for sex and wants to have it non-stop, forcing Cliff to flee the room.
The aliens subject the males to a series of tests to learn more about their abilities. Oliver and Cliff fail miserably, but Willy, searching for his magazines, beats Skipper's combat simulation by unknowingly evading her attacks, causing her to collapse with exhaustion. While conducting a physical examination on Willy, Cosia discovers that his biology is more advanced than anything known to their species. Intriguing Cosia with exaggerated claims about his sexual prowess, Willy loses his virginity to her. Later, he passes an intelligence test by a fluke and has sex with Partha.
In the recreation area, Oliver seeks relationship advice from an artificial intelligence resembling a Wurlitzer jukebox. At the Wurlitzer's suggestion, he adopts a "caveman" approach to seducing Prudence. Shocked by Oliver's behaviour, Prudence flees to a luxurious bedroom, where she relaxes and has sex with him. Meanwhile, Cliff tries to avoid Partha's advances but ends up getting himself trapped in a chair-like machine that the aliens use for sexual intercourse, which causes him excruciating pain.
Awed by Willy's supposed physical and intellectual superiority, the aliens propose to return the others to Earth but take him with them. Willy is reluctant to leave his planet behind but agrees when Skipper, wanting to confirm Cosia and Partha's findings for herself, allows him to seduce her. The ship touches down safely and Oliver, Prudence and Cliff depart. However, the subsequent launch causes a fatal overload and the ship explodes, killing Willy and the three aliens. The disembodied voices of the computer and the Wurlitzer are left stranded in space.