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.

David Vincent and Bob Torin capture an alien leader, whom they hope to show to the authorities as proof; however, the leader's alien comrades foil David's efforts.

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?

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

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

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

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

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

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

Despite Vincent's warnings, a nurse tries to help an injured alien survivor of a saucer crash.

A man seek's Vincent's aid after he is arrested and put on trial for murder after the incineration death of an alien.

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

In Part I of this two-part episode, Vincent uncovers a diabolical alien plot to destroy all of the world's leaders.

In the conclusion of a two-part episode, Vincent must defuse an experimental rocket that if ignited will destroy all heads of state gathered at a world summit meeting.

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.

David Vincent joins forces with the mob when the aliens inadvertently take their illegal shipment of drugs.

The aliens’ experiments with artificial human emotions go awry when one of their subjects, prone to homicidal rages, defects to David Vincent’s side.

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

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

Vincent is horrified to learn the invaders are using strange seed spores that after cultivated will develop into full-grown aliens.

When David Vincent brings an injured alien into the doctor for treatment, the patient's x-rays reveal odd results. While David works to alert the authorities, the aliens conspire to destroy both evidence and witnesses.

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.