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.

Josh Gates takes on the Indian Ocean's punishing waters as he chases a lost treasure, rumoured to be worth more than a billion dollars; team Expedition X takes a risky helicopter flight to investigate a mountain peak known for UFO sightings.