David Adams follows the footsteps of the earliest Greek explorers, testing a new theory on Jason and the Argonauts.

Adams crosses into Afghanistan in search of the lost city of Bactra and Alexander's fabled Central Asian Capital.

Whether Alexander really built 16 cities in Afghanistan and central Asia.

Lost in a sand storm, Adams and his cameraman reach a police outpost in the Taliban-held Kunduz Delta.

Adams enters one of the least-visited places on Earth.