The opening assault on the peaceful science lab by the enemy soldiers was directed by Enzo G. Castellari.
This film represents one of three movies, all made during the mid-late 1970s, that actress Barbara Bach and actor Richard Kiel both appeared in. The movies include O Humanóide (1979), O Comando 10 de Navarone (1978) and 007 - O Espião que me Amava (1977).
Star Wars: Episódio IV - Uma Nova Esperança (1977)-like story elements included: The film is directed by director with alias George Lewis; storm-troopers dressed in black Darth Vader like garb; robodog Kip is a cute canine mini R2D2-like robot; opening credits in flattened Star Wars like lettering; the villain wears a space outfit which resembles Darth Vader's costume; scenes set on a desert planet; a huge spaceship flies overhead; there is a large triangular shaped spaceship; a Millennium Falconesque spaceship has a gun pod at the rear; other various similar sets, props, costumes, vehicles, and background design elements.
The role of Dr. Kraspin was first intended for Donald Pleasence but in the end was cast with Arthur Kennedy.