Secrets of the Underground - S1 E1
Seasons & Episodes
E1: Capone's Escape Tunnels
Feb 14, 2017
E2: Mystery of the Serpent Mound
Feb 21, 2017
E3: America's Buried Massacre
Feb 28, 2017
E4: Rocky Mountain Monsters
Mar 7, 2017
E5: Great Lakes Bermuda Triangle
Mar 14, 2017
E6: California's Hidden Doomsday
Mar 21, 2017
E7: Secret History of the New World
Mar 28, 2017
E8: American Stonehenge
Apr 4, 2017
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