With NASA sending a space probe to Mars to check out if there’s any life on the Red planet it, or the robot in it, conks out after some 30 minutes, due to a surge of unexpected electricity through it’s circuits. Back on earth the brains behind the Martian space probe Dr. David Fielding,Kent Taylor, talking to his fellow scientist friend Dr. Web Spencer, Williams Mins. Dr. Fielding gets a sudden black-out as he just sits in his chair blankly looking into space. The clever Martians have secretly taken over his body and duplicated him.
The movie “The Day Mars Invaded Earth” then goes on for what seems like hours, with it being only 70 minutes long, with Dr. Fielding and his family his wife Clair, Marie Winston, and two teenagers Julie and Rocky, Betty Beall & Gregg Shank, at first spending the Christmas/New Years holiday’s at home.
Things start to turn sour when Julie’s boyfriend Frank, Lowell Brown, shows up. Taking Julie out for a New Years Eve bash when Frank returns her back home and drives off he almost running her over! Julie just appeared out of nowhere on the road. Trying to avoid Julie Franks swerves and crashes totally wrecking his car and killing himself. it later turned out that Julie was nowhere near where Frank was driving in fact she never once left the house.
The Fieldings begin to realize that their somehow being duplicated and call family friend Dr. Spencer over to talk things out. Dr’s. Spence & Fielding together fly to Cape Canaveral in Florida where NASA’s headquarters is and explain what’s been happening to them since the landing of the Martian Space Probe. Dr. Fielding finally runs into himself in, what’s called by everyone in the Fielding mansion, The Big House. Dr. Fielding’s double lets it all out about what’s been happening to him and his family since the NASA space probe landed on Mars. Even more in that’s there’s absolutely nothing that he the Real Dr. Fielding , or anyone else, can to do to stop it.
We and Dr. Fielding are told by Fielding II that what he and his associates did in invading Mars opened a whole new can of worms. Worms in the form of electronic waves that traveled back to Earth to make sure that the Mars probe dies on that planet, together with the robot that it sent there to explore it. Dr. Fielding convincing Dr. Spencer that what’s been happening to him and his family is true has him to drive down to the gate of the mansion and pick it open. It’s been jammed by the Martians to keep everyone there from escaping. Instead Dr. Spencer is ambushed by the Fielding doubles, or Martian impostors, and disintegrated together with the real flesh and blood Fieldings.
As the movie ends we definitely get the impression that both Dr. Fielding and Dr. Spencer, or their Martian doubles, will now do everything to sabotage any new Martian probe in their very top secret work that they do at NASA. In keeping Mars safe from being invaded occupied and it’s natural recourses stripped ravaged and polluted.
