Filmed in Bronson Canyon, a cave complex in the hills above Hollywood where Robot Monster was filmed. Eegah's cavern is Ro-Man's headquarters seen from a different angle.
According to Arch Hall Sr., film opened at a drive-in in Omaha, Nebraska and took in $15,000 at this one engagement. This was equal to what he had spent to produce the film.
This film is listed among The 100 Most Enjoyably Bad Movies Ever Made in Golden Raspberry Award founder John Wilson's book THE OFFICIAL RAZZIE® MOVIE GUIDE.