How did the Notre Dame cathedral emerge over the centuries as one of the world's most celebrated and beloved buildings? Secrets of the Dead: Building Notre Dame takes viewers on a major historical and scientific investigation into the construction of Notre Dame de Paris, which began in the 12th century and was completed several hundred years later. Standing alongside the builders of yesterday and today, uncover the vast architectural, technical, human, financial, and political challenges experienced throughout the cathedral's turbulent history. 

The sinking of the RMS Titanic on April 15, 1912, is one of the deadliest peacetime maritime disasters in history. Mainstream retellings of the tragedy often overlook that the "unsinkable" Titanic was not alone when it sank. A mystery ship was spotted within view of the sinking ship. Instead of sailing closer to aid the drowning passengers, the mystery ship seemingly ignored a fusillade of rockets and signals and sailed away. American and British inquiries accused the SS Californian and its captain, Stanley Lord, of abandoning the Titanic. Decades later, the discovery of Titanic's wreck exonerated Lord and the Californian's role in the disaster, re-opening accounts that implicate another ship.

Join a team of investigators as they search for the identity of the mystery ship and her captain that turned away from the Titanic in its darkest hour, abandoning thousands of lives to the icy waters and their untimely demise.