Producer Milton Sperling, who had frequently quarreled with Lang on the set, thought the final scene ridiculous, since the audience knew the Germans had no nuclear capacity. The film's screenwriters Lardner and Maltz became two of the Hollywood Ten, accused of adding communist dogma to movie scripts such as this one. Writing a script saying the US could not keep nuclear secrets from the USSR, such as in this film, was one of many accusations against the Ten.