The Invaders - Alien Technology

Alien Technology

The type of spaceship by which the Invaders reach the Earth is a flying saucer of a design derivative of that shown in the contestable early-1950s photographs of self-proclaimed UFO "contactee" George Adamski, but instead of having three spheres on the underside, the Invaders' craft has five shallower protrusions. It was a principle of the production crew to not show them with set and prop designs and control panels that were utterly alien from the conventional human ones (such as H.R. Giger would later present in Alien).

They use a small, handheld, disc-shaped weapon with five glowing white lights applied to the back of the victim's head or neck to induce a seemingly-natural death, which is usually diagnosed as a cerebral hemorrhage. They also employ powerful weapons to disintegrate witnesses, vehicles and - in one episode - a sick member of their own race whose infection's side effects were resulting in unwanted notoriety. Also in their arsenal is a small device consisting of two spinning transparent crystals joined at their corners which forces human beings to do the aliens' bidding.