The team finds a mysterious disk, weapons buried in a backyard, a coin on the Lewis and Clark Trail, a rifle that may have belonged to General Custer and a clue on a missing Revolutionary soldier.
The team meets a man who claims to have a pistol owned by Jesse James, and a farmer who thinks he has proof of aliens in his own backyard.
The team examine an ancient axe, an artifact that may be linked to the slave-trade, wooden alligator that may be Aboriginal and a hand-carved pipe that may link the US with the Aztecs.
Dale meets a man who wants to prove he found the original knife of folk hero Jim Bowie; the team explores an alleged Viking artifact, a possible Mayan idol, and what looks like a weaponized bracelet.
The team examines whether a letter found in a picture frame is a lost piece of Abraham Lincoln correspondence, and explores the stories of 2,000-year-old pottery, a jade disc and a piece of coral.
The team explores medieval armor abandoned in the Arizona desert, an artifact connected to early Christianity, a sword found in a well and a ring whose owner thinks it could be Aztec.
The team explores a death mask that could be evidence of murder; a man who thinks he has an Egyptian scarab stone; a mysterious object found near the Oregon Trail; and a cork tied to a shipwreck.
Dale explores rare microscope that might have been owned by Thomas Jefferson. Mike and Blue launch an archaeological dig at what could be the site of a lost battlefield tied to Andrew Jackson.
The team look at two objects that may be worth big money—if they’re not cursed, and examine an object saved from Hurricane Katrina and an alleged Viking drinking horn.