In the U.S., this film was first shown in Spanish-language theaters before being dubbed in English and sold to television.
As with the other three Mexican horror films that he made along with this film, Boris Karloff shot all of his scenes for all four of them in Hollywood in 1968 and with the help of a mobile oxygen unit.
Boris Karloff's last film, cinched by the absence of Julissa, who was replaced in this one film by Christa Linder.
The ornate panes of the spaceship were used as walls for a room in House of Evil, which was made at about the same time.