Season 1
Episode
1
- Capone's Escape Tunnels
Episode
2
- Mystery of the Serpent Mound
Episode
3
- America's Buried Massacre
Episode
4
- Rocky Mountain Monsters
Episode
5
- Great Lakes Bermuda Triangle
Episode
6
- California's Hidden Doomsday
Episode
7
- Secret History of the New World
Episode
8
- American Stonehenge
Season 2
Secrets of the Underground
A search for an underground escape route said to have been used by Al Capone. Also: who or what built earthen mounds in Washington state.