A mysterious disc found in the Sulphur Fork River brings a surprising outcome. Plus, other finds include weapons buried in a family’s backyard, a cryptic coin found on the Lewis and Clark Trail, and two objects that would be of great historical significance if authentic – General Custer’s rifle, and a carved clue in the disappearance of a Revolutionary War soldier.

The guys meet a man who says he can prove he has a bloodstained pistol that was owned by outlaw Jesse James. Dale visits a farmer who thinks he found proof of aliens in his own backyard. Plus, the guys try to figure out how two men discovered similar valuable objects about a hundred miles apart in the Midwest.

While Blue and Mike examine what looks like an ancient axe, Dale inspects an artifact found in a storage locker which may be tied to a brutal practice used on slaves. Plus, a wooden alligator surfaces that could link the Aborigines to America, and a man’s hand-carved pipe causes speculation on whether the U.S. was once the mythical homeland of the Aztecs.

Dale meets a man who wants to prove he found the original knife of folk hero Jim Bowie, but they get an even bigger surprise. Plus, an alleged Viking artifact found in Maine, a possible Mayan idol, and what looks like a weaponized bracelet found on a man’s land in Texas.

Dale and Blue examine whether a woman who found a letter hidden behind a picture frame stumbled on a lost piece of Abraham Lincoln correspondence that could be worth up to $1 million dollars. Mike is on a mission to connect a pair of 2,000-year-old pots found in Arkansas to conquistador Hernando de Soto. The guys also look into the value of a jade disc found in a man’s backyard, a face carving discovered on the shores of the Chesapeake Bay, and a piece of carved coral that’s a perfect match for a prized object in the British Museum.