E1 - Condition: Red

Aired: September 05, 1967

Vincent attempts to thwart the alien infiltration of a Air Defense Command Unit.

E2 - The Saucer

Aired: September 12, 1967

Vincent battles, then destroys an alien guard and captures one of their spacecraft.

E3 - The Watchers

Aired: September 19, 1967

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

E4 - Valley of the Shadow

Aired: September 26, 1967

After an alien is captured in a small town, Vincent warns the townspeople, who assume their captive is a madman.

E5 - The Enemy

Aired: October 03, 1967

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

E6 - The Trial

Aired: October 10, 1967

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

E7 - The Spores

Aired: October 17, 1967

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

E8 - Dark Outpost

Aired: October 24, 1967

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

E9 - Summit Meeting: Part I

Aired: October 31, 1967

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

E10 - Summit Meeting: Part II

Aired: November 07, 1967

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.

E11 - The Prophet

Aired: November 14, 1967

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.

E12 - Labyrinth

Aired: November 21, 1967

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.

E13 - The Captive

Aired: November 28, 1967

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

E14 - The Believers

Aired: December 05, 1967

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.

E15 - The Ransom

Aired: December 12, 1967

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.

E16 - Task Force

Aired: December 26, 1967

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.

E17 - The Possessed

Aired: January 02, 1968

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.

E18 - Counter-attack

Aired: January 09, 1968

David deceives the aliens that he is willing to work with them for a fee, all the while with a plan of attack in mind.

E19 - The Pit

Aired: January 16, 1968

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?

E20 - The Organization

Aired: January 30, 1968

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

E21 - The Peacemaker

Aired: February 06, 1968

David Vincent arranges a meeting between the alien leaders and an Air Force General, who secretly plans to drop a bomb on the alien leaders despite the fact that many innocent people will die in the process.

E22 - The Vise

Aired: February 20, 1968

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.

E23 - The Miracle

Aired: February 27, 1968

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

E24 - The Life Seekers

Aired: March 05, 1968

A pair of aliens who want to return to their home planet and make a political argument against the invasion of Earth ask David Vincent to help them elude an intensive police manhunt.

E25 - The Pursued

Aired: March 19, 1968

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

E26 - Inquisition

Aired: March 26, 1968

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