Octopus like creatures attached to the back of neck

The Earth is invaded by alien parasites—AKA 'slugs'—that ride on people's backs and control their minds.

London, 1983. The iconic synth-pop band Eurythmics performs at the legendary gay club Heaven.

Fifty spaceships, each three miles across, hover ominously above Earth's major cities. The Visitors that emerge are humanlike in appearance and extend the hand of friendship. Our planet's resources are just what these aliens need to survive. And for its future survival, unsuspecting humankind will need... a miracle!

A small group of human resistance fighters fight a desperate guerilla war against the genocidal extra-terrestrials who dominate Earth.

An octopus slithers over objects on land—a doll, a skull—then oozes along the shore into the sea. It secretes its ink. The camera follows it along rocks into deeper water, watching closely as it breathes. Its eye is closed then open. Simple titles, in French and German, suggest what to watch. The octopus alternates the use of breathing tubes on either side. It changes color as cells on its skin contract or dilate. Extreme magnification helps us see these changes. Two struggle, one dies. On shore, fishermen catch them and put them in pails. A single tentacle still has life. Back in the sea, two octopi attack a crab. Soon only a couple of crab legs are visible in the mouth of the victor.