The pre-credits scene where Captain Hamilton is already in command of the MK-31 actually takes place twenty-five minutes into the original Italian cut of the movie. The actual first scene of the movie is the scene where Hamilton slaps Miller. Apparently, the American distributors wanted the movie to open with an exciting outer space scene, despite this blatantly obvious error in continuity.
The English-language version of the film credits most of the cast and crew with pseudonyms. Director Alfonso Brescia is credited as "Al Bradley".
In the original Italian cut however most of the cast and crew are credited under their real names.