TREKCORE > TOS > EPISODES > ASSIGNMENT: EARTH > Behind the Scenes

	"Star Trek" was on the brink of cancellation following this episode. A major letter writing campaign proved to NBC how popular the show really was, in spite of the ratings system of the time. Convinced, NBC granted the show another season.
	This episode was originally written as a pilot episode for a completely new series. When it wasn't picked up, Gene Roddenberry adapted it as a "Star Trek" episode.
	There are absolutely no clouds visible in the shots of the Enterprise orbiting Earth.
	During the early briefing Scotty chips in on the viewscreen from Engineering, but the image fades out before Kirk turns off the viewer (and there's no indication Scotty does it at his end either).
	This is the only episode of the series that credits the guest star after the episode title.