Upcoming episodes, programme details and where to watch over the next seven days. All times are UK time.
America's Hidden Pyramid City: Investigators trace the rise and fall of a thriving metropolis in North America known as Cahokia. (Part 1 of 6) (S)
Dead Sea Treasure Map: The Copper Scroll may hold the secret to the location of the Ark of the Covenant, but experts must decode it in order to find its legendary treasure trove. (Part 2 of 6) (S)
Lost City of the Pharaohs: Investigators search for the lost city of Pi-Ramesses in ancient Egypt, named for Ramesses II, who conducted the largest building program of his time. (Part 3 of 6) (S)
King Tut's Tomb - the Hidden Chamber: Since Howard Carter's discovery in 1922, archaeologists have been trying to unlock the secrets of Tutankhamen's tomb. (Part 4 of 6) (S)
Search for the Holy Grail: The quest for the Holy Grail has consumed knights, Crusaders and Hollywood alike. One church in Spain says they have found the secret chalice. (Part 5 of 6) (S)