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All Seasons

Season 1

  • S01E01 Beachhead

    • January 10, 1967
    • ABC (US)

    Architect David Vincent searches for someone who will believe he sighted the landing of a spaceship.

  • S01E02 The Experiment

    • January 17, 1967
    • ABC (US)

    David Vincent seeks the help of an astrophysicist's son to prove that the earth has been invaded. But David doesn't know that the young man is in the aliens' power.

  • S01E03 The Mutation

    • January 24, 1967
    • ABC (US)

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

  • S01E04 The Leeches

    • January 31, 1967
    • ABC (US)

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

  • S01E05 Genesis

    • February 7, 1967
    • ABC (US)

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

  • S01E06 Vikor

    • February 14, 1967
    • ABC (US)

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

  • S01E07 Nightmare

    • February 21, 1967
    • ABC (US)

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

  • S01E08 Doomsday Minus One

    • February 28, 1967
    • ABC (US)

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

  • S01E09 Quantity: Unknown

    • March 7, 1967
    • ABC (US)

    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

    • March 14, 1967
    • ABC (US)

    An alien (Michael Rennie) captures Vincent and convinces him he'll be taken to a paradise as proof of the invaders' peaceful intentions.

  • S01E11 The Ivy Curtain

    • March 21, 1967
    • ABC (US)

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

  • S01E12 The Betrayed

    • March 28, 1967
    • ABC (US)

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

  • S01E13 Storm

    • April 4, 1967
    • ABC (US)

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

  • S01E14 Panic

    • April 11, 1967
    • ABC (US)

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

  • S01E15 Moonshot

    • April 18, 1967
    • ABC (US)

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

  • S01E16 Wall of Crystal

    • May 2, 1967
    • ABC (US)

    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

    • May 9, 1967
    • ABC (US)

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

Season 2

  • S02E01 Condition: Red

    • September 5, 1967
    • ABC (US)

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

  • S02E02 The Saucer

    • September 12, 1967
    • ABC (US)

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

  • S02E03 The Watchers

    • September 19, 1967
    • ABC (US)

    Aliens have taken over a hotel in a plot to replace an electronics expert who is helping the US military update defenses.

  • S02E04 Valley of the Shadow

    • September 26, 1967
    • ABC (US)

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

  • S02E05 The Enemy

    • October 3, 1967
    • ABC (US)

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

  • S02E06 The Trial

    • October 10, 1967
    • ABC (US)

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

  • S02E07 The Spores

    • October 17, 1967
    • ABC (US)

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

  • S02E08 Dark Outpost

    • October 24, 1967
    • ABC (US)

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

  • S02E09 Summit Meeting: Part I

    • October 31, 1967
    • ABC (US)

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

  • S02E10 Summit Meeting: Part II

    • November 7, 1967
    • ABC (US)

    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.

  • S02E11 The Prophet

    • November 14, 1967
    • ABC (US)

    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.

  • S02E12 Labyrinth

    • November 21, 1967
    • ABC (US)

    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.

  • S02E13 The Captive

    • November 28, 1967
    • ABC (US)

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

  • S02E14 The Believers

    • December 5, 1967
    • ABC (US)

    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.

  • S02E15 The Ransom

    • December 12, 1967
    • ABC (US)

    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.

  • S02E16 Task Force

    • December 26, 1967
    • ABC (US)

    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.

  • S02E17 The Possessed

    • January 2, 1968
    • ABC (US)

    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.

  • S02E18 Counter-Attack

    • January 9, 1968
    • ABC (US)

    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.

  • S02E19 The Pit

    • January 16, 1968
    • ABC (US)

    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?

  • S02E20 The Organization

    • January 30, 1968
    • ABC (US)

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

  • S02E21 The Peacemaker

    • February 6, 1968
    • ABC (US)

    David Vincent arranges a meeting between the alien leaders and an Air Force General, who claims to want to create a treaty with the invaders.

  • S02E22 The Vise

    • February 20, 1968
    • ABC (US)

    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.

  • S02E23 The Miracle

    • February 27, 1968
    • ABC (US)

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

  • S02E24 The Life Seekers

    • March 5, 1968
    • ABC (US)

    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.

  • S02E25 The Pursued

    • March 19, 1968
    • ABC (US)

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

  • S02E26 Inquisition

    • March 26, 1968
    • ABC (US)

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

Additional Specials

  • SPECIAL 0x1 Beachhead (Extended Pilot)

    • January 10, 1967
    • ABC (US)

    An architect's close encounter with a spaceship leads him to investigate a small town's hydroelectric plant. This episode contains deleted and extended length scenes never broadcast on television.

  • SPECIAL 0x2 Interview with Roy Thinnes

    • July 11, 2012
    • ABC (US)