Harry Bronson

With only a few tinges of conscience, Allan Fields, a nuclear physicist who has sold out to a foreign power, sets about to steal vital scientific secrets and smuggle them out of the country. With the FBI on his trail, he briefly hides out in a rundown tenement house, where he inaugurates a desultory romance with a sluttish woman.

War hero recovers from amnesia & is confronted by his criminal past. (imdb)