"Lost in Space" is an American science fiction television series created and produced by Irwin Allen. The series follows the adventures of a pioneering family of space colonists who struggle to survive in a strange and often hostile universe after their ship is sabotaged and thrown off course.

Although the original concept centered on the Robinson family, many later storylines focused primarily on Dr. Zachary Smith, played by Jonathan Harris. Smith and the Robot were both absent from the unaired pilot, as the addition of their characters was only decided upon once the series had been commissioned for production.

"Lost in Space" is remembered, in part, for the Robot's oft-repeated lines such as "Warning! Warning!" and "It does not compute". Smith's frequent put-downs of the Robot were also popular, and Jonathan Harris was proud to talk about how he used to lie in bed at night dreaming them up for use on the show. "You Bubble-headed Booby!", "Cackling Cacophony", "Tin Plated Traitor", "Blithering Blatherskyte", and "Traitorous Transistorized Toad" are but a few alongside his trademark lines: "Oh, the pain ... the pain!" and "Never fear, Smith is here!"

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