Episodes

1. Beachhead

An architect's close encounter with a spaceship leads him to investigate a small town's hydroelectric plant.

2. The Experiment

David Vincent meets with an eminent astrophysicist who has proof that aliens are invading the planet.

3. The Mutation

With the assistance of Vicki, a nightclub stripper, Vincent continues his search for an alien spacecraft.

4. The Leeches

Vincent is called on by a renowned electronics expert who fears he may soon be abducted by alien invaders.

5. Genesis

Vincent's search for aliens lead him to an underwater sea lab.

6. Vikor

A dying telephone lineman's fantastic story leads Vincent to investigate a huge industrial complex owned by a famous war hero.

7. Nightmare

Vincent travels to a small town to check a possible link between the aliens and an attack of carnivorous insects.

8. Doomsday Minus One

Vincent is called upon to help avert possible alien infiltration at a government nuclear test site.

9. Quantity: Unknown

While investigating the theft of a mysterious cylinder from the site of a plane crash, Vincent is captured and suspected of being an alien.

10. The Innocent

The aliens take David Vincent up into their spaceship and then attempt to prove they have nothing but peaceful intentions by showing him what they've done to a desert valley. But all is not what it seems.

11. The Ivy Curtain

Vincent discovers that a school is being used by the aliens as an indoctrination center.

12. The Betrayed

Vincent discovers a mysterious computer tape that could offer proof of the alien invasion.

13. Storm

Vincent is contacted by a meterologist to help investigate the suspicious nature of a hurricane along the Eastern U.S. coast.

14. Panic

The invaders and Vincent race to capture a wounded alien whose touch brings on freezing death.

15. Moonshot

Vincent helps a security official investigate the deaths of two lunar astronauts in a strange red fog.

16. Wall of Crystal

David's brother, who also thinks he is crazy, is kidnapped by the aliens who intend to destroy the oxygen in our planet's air.

17. The Condemned

The invaders frame Vincent for the death of an owner of an electronics plant who had made discoveries about the aliens.

Overview

The Invaders, alien beings from a dying planet. Their destination: the Earth. Their purpose: to make it their world. David Vincent has seen them, for him it began one lost night on a lonely country road, looking for a shortcut that he never found. It began with a closed deserted diner, and a man too long without sleep to continue his journey. It began with the landing of a craft from another galaxy. Now, David Vincent knows that the Invaders are here, that they have taken human form. Somehow he must convince a disbelieving world that the nightmare has already begun.

Details

Cast

Roy Thinnes

Diana Hyland

William Windom

Kent Smith