IN SEARCH OF explores and investigates the most iconic mysteries and legends of all time. Are UFOs actually visiting the Earth? Can the Ark of the Covenant ever be found? Could the Loch Ness Monster actually exist in some form? To find out, Primetime Emmy nominee Zachary Quinto hosts this global journey, searching for clues with some of the world's top historians and scientists. In the end, we'll reveal brand-new theories and evidence which could completely change our thinking on these enigmatic topics.