Gates travels to the D-Day battlefields and the beaches of Normandy where he joins investigators making history-changing discoveries about the Longest Day. Josh explores alongside military historians using cutting edge technology to uncover shocking secrets about the invasion, including a never-before-discovered complex of Nazi bunkers as well as an unexploded bomb frozen in time in the waters off Normandy's coast. Josh's in-depth investigation reveals forgotten mysteries surrounding the most important battle in modern history.

Josh Gates ventures to Africa, embedding with fierce warriors and squaring off with lions to investigate the mystery of humanity's origins. Then, Expedition X ventures into Cambodia's jungle searching for a monster that's haunted the area for centuries.