David exposes an alien disguised as a prophet who capitalizes on his ability to glow red as a tool to deceive people into thinking that his ""gift"" is from God.

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

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

David Vincent is called in to aid a huge magazine publishing company that has been experiencing disruptive behavior in its company heads, and David believes that the aliens are behind the troubles.

An old college buddy sends David Vincent an urgent message, without any further details other than that it is important. When David arrives, Ted has been brain washed so that he can no longer remember why in the world he'd wanted to see his friend. It soon becomes obvious that the aliens are using mind control of some sort.

In a small New Mexico town, a provincial teenage girl witnesses an alien’s incineration and believes it to be a sign from God.

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

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

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

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

Julian Reed calls upon David Vincent to help him expose aliens who have infiltrated The Slaten Research Center. By the time David arrives at the scene, Julian's having hallucinations. Is Julian truly a lunatic, or are the aliens behind his mental lapse?

David Vincent and Edgar Scoville attempt to warn a senator that a governmental official is an alien, while Andy Hatcher tries to prove otherwise.

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

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

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

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

A hysterical hotel manager tells Vincent aliens are taking over his hotel.

A Russian ambassador summons David Vincent after he finds that a burglar caught inside the embassy is an alien.

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

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

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

While investigating the Invaders susceptibility to minor human ailments, Vincent unknowingly is taken aboard an alien spacecraft.

David Vincent is kidnapped in a sneak attack on his new found alien-fighting allies, and he must try to escape an alien installation with a human psychologist.

Racist issues arise between David Vincent and the Baxters, a black couple, when David produces evidence that another African American in line for an important position with the space program is actually an alien.

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.