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Variety mistakenly lists the director as Edward rather than Edwin L. Marin. A pre-production news item in Hollywood Reporter notes that Albert DeMond and Larry Bachman were to collaborate on the script for this film, however, DeMond's name is not listed in any other source and his participation in the film cannot be confirmed. Another Hollywood Reporter news item noted that M-G-M used the Chrysler testing grounds in Detroit for portions of the film. According to Daily Variety, race footage of an actual Indianapolis 500 race was included in the picture, and the race at the end of the film was a fictionalized recreation of the 300 m.p.h. speed record set by Sir Malcolm Campbell at the Utah Salt Beds. Although Campbell authored a book entitled Speed, that book is not related to this film. Actress Patricia Wilder, a popular radio personality known as "Honeychile," made her motion picture debut in the film.