Passing through a time warp, the Robinsons do return to Earth in the year 1947. They are mistaken as invaders and start the UFO scare of the 1940's.
Did You Know?
One of the crew members explains to the townspeople that in the future that they belong in, man had first landed on the moon in nineteen-seventy; twenty five years forward of those listening, and fifty years before the time they - the crew, had left earth for their journey. Man actually first landed on the moon in nineteen-sixty-nine, but this was shot and premiered several years before that date, and nineteen-seventy was the "presumed" date of first touchdown (although J.F.K. had pushed to have man on the moon before the decade was out.) The year eventually was bumped up, and J.F.K. posthumously got his wish, making this prediction of the future in writing, factually wrong - but insightful. See more
Close-ups of the Jupiter 2 shortly after it lands on Earth are shown with a rotating radar/satellite dish on the top of the ship. Minutes before when the ship was shown just before touch-down, no such dish is visible. See more
References Visit to a Small Planet