In the U.S., this film was first shown in Spanish-language theaters before being dubbed in English and sold directly to television.
As with the other three Mexican horror films that he starred in along with this film, Boris Karloff filmed all of his scenes for all four of them on a soundstage in Hollywood in 1968 with the help of a mobile oxygen unit.
The final film of Boris Karloff before his death in 1969; this was cinched by the absence of Julissa in it, who was replaced just in this one film by Christa Linder.
The ornate panes of the spaceship in this film were also used as the walls for a room in "House of Evil", which was made at about the same time.