Ercole alla conquista di Atlantide

In the 6/15/1961 issue of the British magazine "Health and Strength," about this movie and under the title "A New Hercules," Oscar Heidenstam wrote: "Furthermore Reg Reg Park was not going to have his reputation as the greatest physique of all time mucked about by clauses in his contract that he should not weigh more than a certain amount, etc. He stipulated that if he was to play Hercules, he wanted to look like one imagined the legendary Hercules to be. He got his way and everything possible was put at his disposal for him to keep in his usual peak form during the making of this very strenuous and stupendous film. [...] The producers kept weights on the set for him, so that he could keep in tremendous physical shape. In spite of a very exhausting film schedule Reg lost only 5lb. in body weight. His normal chest is 53in. and his waist a net 32in., his body weight around 230lb. [...] Because Reg is so big they were unable to find a "stand-in'' for him, so Reg has had to do all the stunts for himself. [...] In a shipwreck scene he was badly battered and bruised when tons of water washed him into the mast and ropes.

Near the end of the film, Hercules swims away from the island to a boat, but when he climbs aboard he is completely dry.

For the Woolner Brothers U.S. release version, under the title "Hercules and the Captive Women", the original score has been replaced by a stock score selected by Gordon Zahler. Zahler used much of the same music he had selected for the U.S. release of Kurt Maetzig's _First Spaceship on Venus (1962)_ as well as portions of the score from Jack Arnold's _Creature From the Black Lagoon (1954)_ .

Edited into La sfida dei giganti (1965)