S01E01 Beachhead
An architect's close encounter with a spaceship leads him to investigate a small town's hydroelectric plant.
The Invaders
David Vincent has seen them...
S01E09: 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.
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.
Episodes
S01E02 The Experiment
David Vincent meets with an eminent astrophysicist who has proof that aliens are invading the planet.
S01E03 The Mutation
With the assistance of Vicki, a nightclub stripper, Vincent continues his search for an alien spacecraft.
S01E04 The Leeches
Vincent is called on by a renowned electronics expert who fears he may soon be abducted by alien invaders.
S01E06 Vikor
A dying telephone lineman's fantastic story leads Vincent to investigate a huge industrial complex owned by a famous war hero.
S01E07 Nightmare
Vincent travels to a small town to check a possible link between the aliens and an attack of carnivorous insects.
S01E08 Doomsday Minus One
Vincent is called upon to help avert possible alien infiltration at a government nuclear test site.
S01E09 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.
S01E10 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...
S01E11 The Ivy Curtain
Vincent discovers that a school is being used by the aliens as an indoctrination center.
S01E12 The Betrayed
Vincent discovers a mysterious computer tape that could offer proof of the alien invasion.
S01E13 Storm
Vincent is contacted by a meterologist to help investigate the suspicious nature of a hurricane along the Eastern U.S. coast.
S01E14 Panic
The invaders and Vincent race to capture a wounded alien whose touch brings on freezing death.
S01E15 Moonshot
Vincent helps a security official investigate the deaths of two lunar astronauts in a strange red fog.
S01E16 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.
S01E17 The Condemned
The invaders frame Vincent for the death of an owner of an electronics plant who had made discoveries about the aliens.
Cast
Roy Thinnes
David Vincent
Diana Hyland
Sherri Vikor
William Windom
Major Rick Graves
Kent Smith
Stan Arthur
