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The film's title card is preceded by footage of the space station and ship and voice-over narration describing the not-too-distant future of space exploration. When the narrator says the words "conquest of space," the title card comes up at the same time. Cast credits appear only at the end of the film. Chesley Bonestell, who is credited onscreen both as the co-author of the book on which the film was based and as "astronomical" artist, was the book's illustrator and had worked with producer George Pal on previous science fiction projects.
According to a June 1952 Hollywood Reporter news item, Pal and associate producer Y. Frank Freeman, Jr. went to New York to "confer with scientists" about the script. In September 1953, Paramount announced plans to shoot the film in a new type of 3-D, noting that the decision had been inspired by the studio's successful use of the illusion on a "Popeye" cartoon, "Ace of Space." The film was shot in standard format, however.
Actor Ross Martin made his screen debut in the picture. Footage of Rosemary Clooney singing part of the song "Ali Baba" from the 1953 Paramount release Here Comes the Girls , is seen during the television broadcast sequence of the picture. Hollywood Reporter production charts add Georgiann Johnson to the cast, but her appearance in the final film has not been confirmed. In November 1954, Daily Variety reported that portions of the picture involving Benson Fong's character "Imoto" were to be "revised" in order to incorporate information that scientists had recently discovered about Mars. According to a July 1954 Hollywood Reporter news item, score composer Van Cleave wrote a marching song for the film, entitled "Up! Up! Up!" No songs were included in the final film, however.
Conquest of Space was not well-received by reviewers and marked Pal's last film for Paramount, the studio at which he had made the successful science fiction films When Worlds Collide and War of the Worlds (see entries below).