On this episode, Mark and the crew are back at Grand Cayman Island… and on this adventure they're going night diving to ...

The past teemed with unknown gods who visited the primeval Earth in manned spaceships,' he declared in his first global bestseller, Chariots Of The Gods, in 1968.

Relief of Osiris from the Temple of Seti I, Abydos, Egypt. According to Egyptian mythology, Egypt’s first king Osiris sailed around the world spreading knowledge, exactly like the Feathered Serpent ...