This was broadcast as a mini-series in Italy, using a lot of footage that never made it to the theatrical release.
Reb Brown, a black belt in both Shinto-kahn and American karate, and a purple belt in Gracie Jiu-jitsu, performed all of his stunts on the film.
Even though he was speaking English when filmed, Reb Brown's voice is dubbed over in the English language version by Gregory Snegoff. For the close-up where Yor yells "Good!" after Kalaa dances for him, Brown was simply belching for each take. However, not all of Yor's lines were dubbed. When Yor shouts, "Damn talking box!" that is clearly Brown.
Reb Brown had to maintain his muscular physique during the six months of shooting. Because there was no exercise equipment for him to work with, he did a minimum of 1,000 push-ups and sit-ups every other day.