Season 4
9 episodes · Apr 23, 2025
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S4E1The Cult Hotel
Apr 23, 2025Get chills in a bleak communications hub that housed a California cult and then eye a secret US Navy arsenal in Florida.
- S4E2
Hunting for the Ship of Gold
Apr 30, 2025A 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.
- S4E3
America's Gun Factory
May 7, 2025A company town produces weapons that transform the Wild West and a building complex revolutionizes communications on this world and beyond.
- S4E4
Nazi Secrets in the Empire State
May 14, 2025Visit 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.
- S4E5
The Vermont Doomsday Gun
May 21, 2025A research facility spawns new technology with earth-shattering implications and a coastal haven for African Americans changes the nation.
- S4E6
Idaho's Atomic Ghost Town
Jul 9, 2025The 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.
- S4E7
The Lair of the Mothman
Jul 17, 202556mA 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.
- S4E8
Secrets of the Olympia Brewery
Jul 30, 202552mA 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.
- S4E9
America's Hidden Training Camp
Aug 6, 202552mA 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.