Though the TV series concept centered on the Robinson family, many story lines focused primarily on Dr. Zachary Smith (Jonathan Harris) who is a medical doctor, originally an utterly evil would-be killer who became a sympathetic anti-hero by the end of the first season, providing comic relief to the TV show (and causing most of the episodic conflict). Smith was not in the unaired pilot and neither was the robot. A meteor storm (which should have smashed the ship to pieces) in the unaired pilot put them off course. In the first aired episode, Smith's unplanned for extra 200 lbs of weight put them off course so that they encountered the meteors. In the un-aired version, they were going at such a relatively slow speed that they wondered if they were on Mars. In the pilot, just seconds of hyper-drive and they were lost, unknown light years from Earth.
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