Nazi Agent is a 1942 American spy film directed by Jules Dassin, in his first feature-length film for MGM. It stars Conrad Veidt playing identical twins, one loyal to the United States (U.S.), the other a dedicated German Nazi.

Julius Dassin was an American film and theatre director, producer, writer and actor. A subject of the Hollywood blacklist, he subsequently moved to France, and later Greece, where he continued his career. He was a member of the Academy of Motion Picture Arts and Sciences and the Screen Directors' Guild.