"Valkyrie" is a historical thriller directed by Bryan Singer and stars Tom Cruise as Claus von Stauffenberg, a German army officer who leads a plot to assassinate Adolf Hitler during World War II. The film's title, "Valkyrie," refers to the mythological female figures known as the Valkyries, who choose which warriors die in battle and take them to Valhalla. The operation to kill Hitler was code-named "Operation Valkyrie."