This is the second film in the Gamma-One series and follows Wild, Wild Planet (a.k.a. I Criminali della Galassia ("Criminals of the Galaxy")) and precedes War Between the Planets (a.k.a. Il Pianeta Errante ("Planet on the Prowl")) and Snow Devils (a.k.a. La Morte Viene dal Pianeta Aytin ("Death Comes From The Planet Aytin")).
Russel, Gastoni, Nero and Guistini repeat their characters from "Wild, Wild Planet," while Fiermonte replaces Umberto Raho as Gen. Halstead, and Calisti, Bonos, Canti, Montalbano, Desmond, Scarchilli, Raviaoli, Lemoine, Savage and Tahi return in different roles.
Italian censorship visa # 46020 delivered on 20-11-1965.