Underground Marvels

Episode 1 2019-10-17 - Secrets of the Rock
Episode 2 2019-10-24 - Mystery of the Lost Labyrinth
Episode 3 2019-10-31 - Secrets of the Terror Tunnels
Episode 4 2019-11-07 - The Renegade's Lair
Episode 5 2019-11-14 - Cave of the Body Snatchers
Episode 6 2019-11-21 - World's Biggest Labyrinth
Episode 7 2019-12-05 - Treasures of the Lost Mine
Episode 8 2019-12-12 - Ghosts of the Hell Maze
Episode 9 2019-12-19 - Conspiracy in the Buried City
Episode 10 2019-12-26 - Curse of Cannibal Caves

Episode 1 2021-08-05 - Hotel Bunker of the Apocalypse
Episode 2 2021-08-12 - Mystery of the Kentucky Cave
Episode 3 2021-08-19 - Cincinnati's Secret Caverns
Episode 4 2021-08-26 - Buried Lab of the Black Hills
Episode 5 2021-09-02 - Ireland's Underground Alcatraz
Episode 6 2021-09-09 - Subterranean Silo Survival
Episode 7 2021-09-16 - Italy's Subterranean Secret
Episode 8 2021-09-23 - Grand Canyon's Lost Treasure
Episode 9 2021-09-30 - Murder Raid Tunnels
Episode 10 2021-10-07 - Medieval Maze of Secrets