TV Guide History Sunday

Host David Duchovny explores declassified documents detailing advanced and bizarre spy gadgets, including a children's toy, a supersized spy balloon and more.

David Duchovny explores declassified documents detailing morally ambiguous alliances, including the CIA's attempt to hire mobsters to assassinate Fidel Castro.

Host David Duchovny investigates declassified reports about secret bases, including a deadly poison lab used by the Soviet Union's most infamous doctor.

Host David Duchovny explores newly released documents giving a glimpse into covert NASA plans, disastrous Soviet coverups and more.

Two like-minded individuals, Nikola Tesla and Guglielmo Marconi, aim to expediate the time-consuming process of delivering information across long distances.

As electric power becomes more common in people's homes, housekeeping tasks that used to take hours upon hours to complete are quickly accelerated.

Innovators William Boeing and Donald Douglas face serious competition as they attempt to become the biggest names in airplane-based travel.

As the United States enters the 20th century, the country shifts from a largely agrarian society to a more modernized structure that relies on power tools.

Alexander Graham Bell and Elisha Gray battle for industry dominance as the telephone becomes an immediate improvement over telegraphs and letters.

A property is stocked with treasures; a bid is placed on a class car collection's 1961 Messerschmitt; a buyer eyes the rare Fiat cutaway car from Italy.

Mike and Frank enter a sprawling collection at a Connecticut dairy farm before traveling to Vermont, where they discover rare skis for a Model T Ford.

Country icon's Dollywood theme park gives the guys two weeks to find key vintage petroliana pieces for a tribute to the 1930s Smokey Mountain Fire Patrol.

A road trip through Florida leads to a creepy kitsch collection and a captain's tugboat-home with an odd pet; in Iowa, Mike preps for the shop's grand opening.

The guys need to find good spots in Texas, and in Illinois, they uncover one of the best cars they've ever seen; Mike makes a $30,000 bet on a Harley.

In Colorado, a 135-year-old opera house is stocked with vintage Americana; a picker's junkyard home has expensive items everywhere.

In Virginia, Mike and Frank meet a real motorcycle legend ready to unload high-octane stock; VIP access into a unique mancave yields a rare, strange relic.

Mike is tempted to buy a classic 1935 Auburn automobile; a Harley collector in Iowa is a tough negotiator; Mike's biggest investment is revealed a year later.

Frank becomes immediately interested in a rare Harley Davidson Knucklehead motorcycle while at a certain collector's secretive compound in California.

The guys discover a collection of untouched inventory from one of America's oldest bicycle and sporting goods store just outside of Washington, D.C.

While the Mike and Frank travel around the Appalachian Mountains of Virginia, they discover a hidden highway with a unique selection of historical mementos.

Mike and Frank are immediately interested in a rare, barn-stored Model-A tow truck from a unique collector from the state of Indiana.

Frank becomes immediately interested in a rare Harley Davidson Knucklehead motorcycle while at a certain collector's secretive compound in California.

The guys discover a collection of untouched inventory from one of America's oldest bicycle and sporting goods store just outside of Washington, D.C.

While the Mike and Frank travel around the Appalachian Mountains of Virginia, they discover a hidden highway with a unique selection of historical mementos.

Mike and Frank are immediately interested in a rare, barn-stored Model-A tow truck from a unique collector from the state of Indiana.