powered by AFI
The working titles of this film were Canada's Great Manhunt and The Kill. According to a September 1954 Hollywood Reporter news item, writer James Benson Nablo appealed to the Screen Writers Guild [SWG] to solve a dispute with producer David Diamond. Nablo alleged that Diamond had offered to sign him to write the screenplay for the film based on a Coronet magazine story by Stephen Brott entitled "Canada's Great Manhunt." No other contemporary information about Brott has been found, however, and his contribution to the finished picture, if any, has not been determined. The September 1954 news item also announced that Geoffrey Homes had been signed to write the film's screenplay. In December 1954, Hollywood Reporter announced that Nablo and Diamond's dispute had been settled and "Nablo's subsequent credit line [had] been amicably adjusted with payment of an unannounced sum to Nablo." The final determination of his writing credit was left to the SWG.
Although October and November Hollywood Reporter news items reported that Gay Nelson had been cast as "Hulda," a member of a "German spy ring," she does not appear in the finished picture. Other Hollywood Reporter news items include Dennis King and Cosmo Sardo in the cast, but their appearance in the completed film has not been confirmed. November 1954 Hollywood Reporter news items noted that background scenes were shot on location in Montreal, Canada. As reported in an November 18, 1954 Hollywood Reporter news item, United Artists Corp supplied 100% of the film's financing to producers Diamond and Samuel Bischoff.