History

There's nothing more fascinating than a code that can't be cracked. For centuries, mankind has devised ingenious ways to hide valuable information--using everything from enigmatic puzzles, to complex ciphers and secret symbols. If history's unbreakable codes can be deciphered...could we unlock answers to some of the greatest mysteries of both the past and present?

The team investigates a disturbing pattern of UFOs allegedly appearing near U.S. Air Force bases that house nuclear weapons and nuclear-powered U.S. warships.

Former intelligence officer Chris Mellon spearheads an investigation into one of the UFO phenomenon's great mysteries; giant triangles, allegedly capable of incredible acceleration and speeds, have been seen all over the world.

Hawkeye's face is badly burned when a stove he is trying to fix explodes.

Radar's sudden promotion to lieutenant stuns everyone but Hawkeye and B.J., who were responsible.

Joe assists Alex Debogorski of "Ice Road Truckers" fame; Scott takes a frightening tumble on the icy tarmac; mechanic Chuck stirs up trouble.

Breakdowns threaten the company's Christmas toy run to the Arctic; the ensuing chaos pushes a stressed-out Kelly past the breaking point.

Logger Kevin Wenstob gets terrible news as his crew struggles to bring the last of their 200 truckloads of logs off the mountain before winter shuts them down.

Joe assists Alex Debogorski of "Ice Road Truckers" fame; Scott takes a frightening tumble on the icy tarmac; mechanic Chuck stirs up trouble.

Breakdowns threaten the company's Christmas toy run to the Arctic; the ensuing chaos pushes a stressed-out Kelly past the breaking point.

Logger Kevin Wenstob gets terrible news as his crew struggles to bring the last of their 200 truckloads of logs off the mountain before winter shuts them down.

In the wake of the Civil War, American settlers flood into the Great Plains, seizing Native American land as they go; but the Lakota leader, Sitting Bull, alongside Crazy Horse, organizes an unprecedented resistance movement.

Sitting Bull and Crazy Horse face George Armstrong Custer and the Seventh Cavalry in the battle of Little Bighorn; when their triumph over the U.S. Army fails to end the war they must continue the fight to preserve the Lakota way of life.

Chief Little Turtle leads the Indian Nations of the Northwest Confederacy to a major victory over the fledgling U.S. Army; a new force under General "Mad" Anthony Wayne embarks on a counteroffensive, leading to a new era of westward expansion.

After building his reputation as a formidable hunter, John Colter chooses to stay out in the wilderness and enter the booming fur trade; when he repeatedly ignores warnings from the Blackfeet, he's taken captive and forced to make a run for his life.

Missionaries Marcus and Narcissa Whitman seek to bring their way of life to the local Cayuse people; their struggle to adapt heightens fears and tensions both with the Cayuse, and each other, setting up a tragic encounter with historic consequences.

The abduction of Cynthia Ann Parker kicks off a series of confrontations; Cynthia Ann's rescue sees her violently removed from her new native family and dropped back into a hostile foreign culture, while pushing her son on a campaign of revenge.

In California, Mexican immigrant Joaquin Murrieta forms a gang of outlaws that spreads terror across the state; a posse of California Rangers, led by Harry Love, takes Murrieta down - but his legend as a hero to the downtrodden lives on to this day.

When Kansas becomes a battleground in the national debate over slavery, settlers on both sides of the issue pour into the territory to determine its future as a free or slave state in its eventual admission to the Union.

When Civil War veteran Col. Henry Carrington takes command of Fort Phil Kearny in Northern Wyoming, he never expects to face such a ferocious enemy as Red Cloud's band of Lakota Sioux.

In northern Wyoming's Powder River Valley, a group of ranchers band together to protect their rights to graze cattle; a powerful cabal of cattle barons smear the ranchers as common thieves and plot an invasion.

Chief Little Turtle leads the Indian Nations of the Northwest Confederacy to a major victory over the fledgling U.S. Army; a new force under General "Mad" Anthony Wayne embarks on a counteroffensive, leading to a new era of westward expansion.