Lost in Space as a happy crew without internal conflicts. While many storylines in the later series focused primarily on Dr. Zachary Smith, a stowaway and saboteur played by Jonathan Harris, he was absent from the unaired pilot. His character was added after the series was commissioned for production. The pilot episode was first aired on television during a 1997 retrospective. CBS bought the series, turning down "Star Trek" in favor of "Lost in Space". Before the first episode was filmed, the characters Smith and the Robot were added, and the spaceship, originally named "Gemini 12", was renamed the "Jupiter 2" and redesigned.
Lost in Space / farce episodes of the series as fanciful entries in Penny's Space Diary. Complex adult-themed story concepts were introduced and the story included a love triangle developing between Penny, Judy and Don. The "Jupiter 2" had various interior designs in the first year. The first year had an arc ultimately leading the travelers to Alpha Centauri with Smith contacting his former alien masters along the way. Aeolis 14 Umbra were furious with Smith for not having succeeded in his mission to prevent the "Jupiter 2", built with technology from a crashed ship of their race, from reaching the star system