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The film's working title was variously listed as Time Slip and Timeslip in Hollywood Reporter production charts and news items. The picture opened in London as Timeslip, where it was reviewed in November 1955 at a length of 8,385 feet and a running time of 93 minutes. The print viewed was the American release version, which was approximately 15 minutes shorter than the British version. Portions of the picture, including approximately ten minutes of the final scenes, were not discernable in the print viewed. The conclusion of the story described in the above summary was based on the film's dialogue. In 1957, screenwriter Charles Eric Maine, under his real name, David McIlwain, published a novel entitled The Isotope Man that was the same story as The Atomic Man. As the film's only writing credit is for Maine's screenplay, it is likely that his novel The Isotope Man was developed after the film.
Although the onscreen screen credits read: "And introducing Peter Arne," Arne had actually made his film debut in The Men of Sherwood Forest, which was made and released in Great Britain prior to The Atomic Man. Publicity materials in copyright records refer to director of photography A. T. Dinsdale as "Dick Dinsdale" and film editor Geoffrey Muller as "Geoffrey Robinson." The materials also refer to Faith Domergue's character as "Jill Friday," although she is called "Jill Rabowski" in the film. According to information in the file on the film in the MPAA/PCA Collection at the AMPAS Library, Allied Artists had a pre-production financial involvement in the film. Modern sources add the following actors to the cast: Leonard Williams, Mary Jones, Philip Dale, Philippa Hiatt, Gordon Bell, Ian Cooper, Vanda Godsell, Dervis Ward and Anthony Woodruff.