Tuesday, 1 September 1 airing
15:00
National Geographic Channel
S1 E1 · Underground Cities and Secret Chambers
Thursday, 3 September 1 airing
15:00
National Geographic Channel
S1 E2 · Crystal Cathedrals and Buried Bunkers
Friday, 4 September 1 airing
15:00
National Geographic Channel
S1 E3 · Hidden Hypogeum and Lost Letters