New evidence suggests that Hitler's second-in-command was secretly replaced by a doppelganger.

Three inmates are said to have escaped from Alcatraz prison, but even today, it's never been proven; new evidence might finally crack this notorious cold case, as experts use forensic science and cutting-edge tech to investigate fresh leads.

Brand-new evidence reveals the secrets of a Nazi program to build a nuclear bomb, and using cutting-edge science and tech, experts uncover classified files that reveal how closer Hitler came to this terrifying superweapon.