This was originally intended to be a vehicle to team Jonathan Haze (who also wrote the script) with Dick Miller.
Jonathan Haze wrote the script for this film under the title "Monsters From Nicholson Mesa." This title was a friendly jab at American International co-founder James H. Nicholson.
This was the third and final feature film for Dolores Reed. She would die of a drug overdose the following year.
This was the final feature film to be directed by Bruno Vesota.
Bruno VeSota: Bad-guy car passenger that gets knocked out during Philbrick's "Commander Connors" vision.