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?
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