Factual error: The colonists' planet has twin suns and, we're told, no night. We see the suns, side-by-side in the sky. But twin suns would not create perpetual day. Night/day is caused by the rotation of the planet on its axis, regardless the number of suns. In a binary star system, the two stars orbit each other around a central point in space. The planets would orbit around that central point too. In order for there to be no night, the planet would have to pass between the two stars, a process it would not survive. The gravitational forces of two opposing suns would tear the planet apart.
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Writer Richard Matheson based this story on a true incident. His young daughter fell out of bed one night and rolled against the wall just far enough away that when he reached under the bed, he at first couldn't find her. This inspired both a short story and this TZ script, where a child falls into another dimension. See more...
On Thursday We Leave For Home (season 4, episode 16)
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