The 1960's TV series had two theme songs, both by John Williams. The first one, with the great tuba riff, was used for the first two seasons, but for some reason a new theme was used for the third season before the show was cancelled.

The ultimate decision to change the theme song this would have gone through producer Irwin Allen.

I guess we shouldn't complain, because we got another memorable TV theme song out of it. But I'm curious as to why Allen decided to do this.


1 Answer 1


Per Starlog #219, the show was dramatically retooled for its third season. Rather than spending an episode in space, then crash-landing on a planet where they would spend the remainder of the series, the third season was intended to be a showcase of different space-based and planet-based adventures.

Although the second season clocked good ratings. Lost in Space underwent a format change in its third and final season as the Jupiter 2 traveled to new worlds every week. The stories were more serious and gave more attention to other cast members. "It was felt there had been too much whimsy in the second year," says Duncan. "The result was fewer scenes between family members, and less interplay between Smith and the Robot. There was also a lot more action, done at a time when TV violence was the chief concern of social critics."

There was significantly more action overall (this being reflected in the new start sequence and more exciting theme song) as well as the introduction of a traveling pod that would allow them to visit a different planet each week and props, alien costumes and spaceship models being regularly recycled between Lost in Space and Voyage to the Bottom of the Sea, creating the illusion of a larger budget.

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