Was Adolf Hitler a homosexual? Lothar Machtan is a well-respected German historian who, in 2001, published a book called The Hidden Hitler, in which he speculated that the infamous Nazi leader was gay in his secret life. What was the basis for Machtan's theory? And how would our perspective on Hitler and the Third Reich be changed if he was in fact gay? The Hidden Führer: Debating the Enigma of Hitler's Sexuality is a documentary which offers an in-depth look at Machtan's book and the potential implications of Hitler's homosexuality in terms of world history and the gay movement.