- This was one of the last films produced for RKO. By the time it was completed, RKO had ceased production and distribution. It was released through Warner Brothers.
- This went into production as RKO was preparing to shut down. It was believed to have had a much larger budget which was later cut. This greatly affected the quality of the special effects.
- Among the last minute cost-cutting measures inflicted upon this film was the elimination of all scenes taking place on the moon.
- Some of the music is actually the "electronic tonalities" created by Louis Barron and Bebe Barron for Forbidden Planet (1956).
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