Historian Jonathan Petropoulos investigates former Nazi art dealer Bruno Lohse's role in post-war America. Lohse established relationships with curators at some of the nation's most important cultural institutions and became an invisible hand, dealing in looted art – even as the families of the original owners pursued the restitution of works rightfully theirs.

Just off the coast of Alexandria, 23 feet below the surface of the Mediterranean, lay the remnants of a mysterious ancient monument. For more than 30 years, the French explorer Franck Goddio has been working under a shroud of secrecy, hoping to confirm these remains as the temple of Cleopatra. If true, this unprecedented discovery could reveal vital new information about Cleopatra's reign and her connection with the goddess Isis.