Discovery Channel HD Josh Gates explores the supernatural, from Nikola Tesla's mysterious Death Ray to an encoded message from a Sicilian nun believed to be of demonic origin; scientists uncover the real explanation behind the Oracle of Delphi's prophetic visions. 2026-06-13 Josh Gates travels to the Kingdom of Kush to dive the flooded pyramid tomb of a king; the murky water provides zero visibility, and the pyramid is at risk of collapse; the dive could unlock the mystery of a civilization that once conquered Egypt. 2026-06-13 The conclusion to Josh Gates' dive into a Kush king's flooded pyramid tomb; Josh scales a mountain to learn how the Kingdom of Kush conquered Egypt and braves the murky waters for one more dive to find the king's mummified remains. 2026-06-13 Josh is on the hunt for the lost tomb of Alexander the Great; he dives Egypt's coast, revealing ruins of Alexander's Royal Quarter; he tunnels under modern Alexandria, but a water pump malfunction puts everything at risk. 2026-06-13 Spanning Europe and Africa, Josh's chase for Alexander's remains and fortune ramps up; clues mount in a flooded ruin beneath Alexandria, Egypt; Josh gathers evidence Alexander's body may actually lie in Venice's St. Mark's Cathedral. 2026-06-13 With exclusive access to one of the Seven Wonders of the Ancient World, Josh unravels wild conspiracy theories about the pyramid; crawling through every passage under the pyramid, Josh searches for the lost tomb and treasure of the Pharaoh Khufu. 2026-06-14