Season 4

1. The Cult Hotel

2025-04-23

Get chills in a bleak communications hub that housed a California cult and then eye a secret US Navy arsenal in Florida.

2. Hunting for the Ship of Gold

2025-04-30

A crew searches for a shipwreck loaded with gold and sets off a long legal dispute and a lavish complex in the Catskills attracts many of America's great comics.

3. America's Gun Factory

2025-05-07

A company town produces weapons that transform the Wild West and a building complex revolutionizes communications on this world and beyond.

4. Nazi Secrets in the Empire State

2025-05-14

Visit strange structures in New York where Nazis helped launch the US Space Race and then see a New Orleans amusement park where joy turned to despair.

5. The Vermont Doomsday Gun

2025-05-21

A research facility spawns new technology with earth-shattering implications and a coastal haven for African Americans changes the nation.

6. Idaho's Atomic Ghost Town

2025-07-09

The remains of Idaho's nuclear industry mark a new era of American history; a distillery in rural Kentucky revolutionizes liquor; a New England settlement prospers despite prejudice; subterranean chambers produce many of the nation's monuments.

7. The Lair of the Mothman

2025-07-17 · 56m

A desert facility trains a nuclear strike force; a church becomes a sanctuary from racial violence; an old military building spawns a creature that haunts a small town.

8. Secrets of the Olympia Brewery

2025-07-30 · 52m

A brewery in the Pacific Northwest sustains prospectors during the Gold Rush; a Wyoming mining settlement descends into lawlessness; a murder in a small Mississippi town sparks a revolution.

9. America's Hidden Training Camp

2025-08-06 · 52m

A Military Base trains soldiers in modern warfare to help defeat the Nazis; a suburban basement becomes a major cog in the Detroit bootlegging scene; a brave woman leads a labor union against organized crime.