...And Killer Robot: Did a filmmaker capture footage of a wooly mammoth crossing a river in Siberia? Is a recording of a long moaning howl proof that Bigfoot lives in Ohio? Is Sophia the talking robot really out to destroy humanity?

Examining 75 million years of the most credible alien evidence here on Earth, from the age of the dinosaurs to ancient Egypt to the skies over the western desert in the present day.

For the first time in years, our top champions will step back into the arena, tasked with making the grueling Ginunting sword in just five hours, only one will be left standing to compete against J. Neilson, David Baker or Ben Abbott.

The quest for immortality has captivated and confounded us for thousands of years. From the healing powers of the holy grail used by Jesus at the last supper, to the elusive Fountain of Youth, and the storied Philosopher's Stone.

With 500-year-old secrets, hidden in skeletons and stone, Machu Picchu is one of the most puzzling archaeological sites on earth. It's among the ancient world's most enduring riddles: Who built this astonishing complex, and why?

Curse of Skinwalker Ranch

As the team begins drilling in the Mesa, where a massive, possibly metallic object is buried, they have a startling encounter.

Rick, Corey, and Chum are ready to mess with Texas. With the help of trusted companions, they're hoping to round up some gems. Along the way they'll rock and roll with a collection of classic guitars, just plain rock with some fascinating fossils.

...And Killer Robot: Did a filmmaker capture footage of a wooly mammoth crossing a river in Siberia? Is a recording of a long moaning howl proof that Bigfoot lives in Ohio? Is Sophia the talking robot really out to destroy humanity?

Examining 75 million years of the most credible alien evidence here on Earth, from the age of the dinosaurs to ancient Egypt to the skies over the western desert in the present day.

For the first time in years, our top champions will step back into the arena, tasked with making the grueling Ginunting sword in just five hours, only one will be left standing to compete against J. Neilson, David Baker or Ben Abbott.

The quest for immortality has captivated and confounded us for thousands of years. From the healing powers of the holy grail used by Jesus at the last supper, to the elusive Fountain of Youth, and the storied Philosopher's Stone.

With 500-year-old secrets, hidden in skeletons and stone, Machu Picchu is one of the most puzzling archaeological sites on earth. It's among the ancient world's most enduring riddles: Who built this astonishing complex, and why?

Curse of Skinwalker Ranch

As the team begins drilling in the Mesa, where a massive, possibly metallic object is buried, they have a startling encounter.

American Pickers

Mike makes a return pilgrimage to Rick's Michigan honey hole. This time he's determined to seal the deal on a ratty t-shirt and futuristic one-of-a-kind bubble car. Down the road, Robbie and Jersey comb through a late collector's sprawling workshop.

Rick, Corey, and Chum are ready to mess with Texas. With the help of trusted companions, they're hoping to round up some gems. Along the way they'll rock and roll with a collection of classic guitars, just plain rock with some fascinating fossils.

...And Killer Robot: Did a filmmaker capture footage of a wooly mammoth crossing a river in Siberia? Is a recording of a long moaning howl proof that Bigfoot lives in Ohio? Is Sophia the talking robot really out to destroy humanity?

Examining 75 million years of the most credible alien evidence here on Earth, from the age of the dinosaurs to ancient Egypt to the skies over the western desert in the present day.

For the first time in years, our top champions will step back into the arena, tasked with making the grueling Ginunting sword in just five hours, only one will be left standing to compete against J. Neilson, David Baker or Ben Abbott.

For millennia, there has been speculation about how the world will end. From the detailed account in the Book of Revelation, to the prophecies foretold by Nostradamus, and even the belief in devastation caused by a strange blue star.

The death of one of history's most enigmatic rulers--Egypt's King Tutankhamun--remains shrouded in mystery 3300 years later. No one knows what ended the young pharaoh's life, but scientific advancements may be getting us closer to the answer.

Curse of Skinwalker Ranch

During a high-tech laser experiment at the Triangle, the team makes a shocking discovery that may explain the strange phenomena on Skinwalker Ranch.

American Pickers

A Michigan homeowner's historic property includes a private speakeasy. Down the road, Danielle luxuriates in Mae West's former bathtub.

Rick, Corey, and Chum are at the end of their road trip in Winston-Salem. They aim to strike deals with experts, visit antique tractors, try weapons at the range, and meet a NASCAR legend before heading home.

Investigator Katie Paige first encountered terrifying High Strangeness as a 9-year-old while living at Rocky Mountain Ranch in Colorado; now Andy and Paul are bringing her back after 50 years to see if they can capture scientific evidence.

The UnXplained With William Shatner

The Great Flood. The Plagues of Egypt. Sodom and Gomorrah. Moses parting the Red Sea. Are these merely tall tales or could they be historically accurate?

Some of our top champions head back to the forge to face their toughest competition yet: one of the judges. Tasked with making a Vaquero Machete, will this former champion have the skills to prove they have what it takes to Beat the Judges?