It's 20 years after a world war that didn't turn out the way our history books tell us: The Nazis won and they successfully covered up all evidence of the Holocaust. That's the setting for a fictional thriller premiering on HBO Saturday. An SS officer and an American reporter stumble upon evidence that the fatherland's version may not reflect the truth. How they uncover the whole truth follows. Comes recommended byTIME television critic Richard Zoglin.Post your opinion on theArts & Culturebulletin board.