New discoveries at Pompeii are challenging everything we know about the apocalyptic volcanic eruption that destroyed it, and using cutting-edge tech, a team of experts is bringing this lost world back to life to reveal Pompeii's dark and deadly secrets. This is a mashup of episodes from two Science Channel series: "Secrets of the Lost" S01E03 "Pompeii: The Deadly Mystery" and "Unearthed" S04E03 "Pompeii's Doomsday Mummies".