Star Trek: La serie original

Shortly after the cancellation of the series due to low ratings, the staff of the marketing department of NBC confronted the network executives and berated them for canceling this show, which had been one of their most profitable series without anyone realizing it. They explained that although the show was never higher than number fifty-two in the general ratings, when running the numbers though the replacement of the Nielsen rating system, its audience profile had the largest concentration of viewers of ages 18 to 45. In other words, not only did the show have the most sought-after demographic that television advertisers hunger for, it was also one of the most successful series the network had ever aired, and did even better in reruns. This was more than ample justification to contact Gene Roddenberry with a request to revitalize the show. Unfortunately, this turned out impossible, as Paramount had just cleared out their warehouses of most of the sets and props, and rebuilding them would cost around $750,000, so instead, the studio greenlit Star Trek: La serie animada (1973). Although Roddenberry wasn't really interested in doing an animated show, he agreed, in the hope that the show would be successful enough to revive the original series (which it unfortunately didn't).

The deck locations for Kirk's Quarters, Sickbay and Transporter Room vary (usually between decks 4-7) throughout the series.

On some episodes, the closing credits show a still that is actually from the Star Trek blooper reel. It is a close-up of stunt man Bill Blackburn who played an android in Return to Tomorrow (1968), removing his latex make up. In the reel, He is shown taking it off, while an off-screen voice says "You wanted show business, you got it!"

In 2006, CBS went back to the archives and created HD prints of every episode of the show. In addition to the new video transfer, they re-did all of the model shots and some matte paintings using CGI effects, and re-recorded the original theme song to clean it up. These "Enhanced" versions of the episodes aired on syndication and have been released on DVD and Blu-Ray.

Edited into Ben 10: Secrets (2006)