This episode was actually the second produced. The original pilot was not included in the airing package, due to the major cast changes. Tina Louise, Russell Johnson and Dawn Wells were not in the original production.
The first season was shot in black-and-white.
The opening titles end differently in this season than they would in the later seasons: instead of introducing "The Professor and Mary Ann" in the opening, the singer just says "the movie star...and the rest!" Dawn Wells and Russell Johnson would be credited in the closing credits for the first season.