Reinhard Heydrich, and Wilhelm Canaris were the top spymasters in the Third Reich, two rivals who were masked in both mystery and secrecy. But in the end, one man would kill for Hitler and the other would betray him.Reinhard Heydrich, and Wilhelm Canaris were the top spymasters in the Third Reich, two rivals who were masked in both mystery and secrecy. But in the end, one man would kill for Hitler and the other would betray him.