This was the second of two films Santo shot in Cuba in 1958, the other being SANTO VS THE INFERNAL MEN. Santo is never referred to as Santo and is never seen wrestling in the ring in either of the films, he is simply described as a special police operative. The real star of the films were Joaquin Cordero who plays different characters in both films. They apparantly didn't finish both films as the revolution was going on at the same time and the cast and crew left in a hurry so some scenes are repeated in both films. The films were then shelved and released in incorrect order once Santo became a movie star in 1962.