Hangmen Also Die

During the Nazi occupation of Czechoslovakia, a Czech patriot assassinates the brutal "Hangman of Europe" Dr. Franticek Svoboda (Brian Donlevy) seeks her home as an alternative safe house. This turns out to be the home of her father, history professor Stephen Novotny (Walter Brennan), whom the Nazis have banned from teaching. Because the assassin now can't be found, the Nazi leaders in Prague decide to create an incentive for him to turn himself in or for others to do so.