The voice of the American astronaut character, John McLaren is provided by Shane Rimmer, Canadian actor better known for voicing Scott Tracey of the English series Thunderbirds (1965).
Though the Americans and British among others had been making science fiction films earlier in the Fifties, this 1958 Italian co production is considered the first entry by that country into the sci fi genre.
On all of the maps shown, the United States is depicted without the Florida peninsula.
Some of the rockets and missiles shown in this film are... Vanguard, Thor, Jupiter "C", Bomarc, Nike-Alex, Redstone, Terrier, Talos, Sargent, and Hawk.