The house used in the film belonged to Peter Falk, a friend of the film's writer and producer, Wayne Rogers. Falk was slated to have a cameo in the film, but director Ted V. Mikels cut Falk's scene, saying that he was too comedic for what Mikels saw as a serious role in a sci-fi/horror film.
The opening title sequence with the wind-up toy robots was shot at Griffith Park in Los Angeles, California without permits.
The Misfits song "Astro Zombies" is a tribute to this film.
The electronic equipment in Dr. DeMarco's lab was purchased from various army surplus stores.
Shot over a period of 6 days.