This episode features an exorcism in Maryland when demonic possession is involved, ghosts of Louisiana's Myrtles Plantation, Wisconsin's Werewolves, California's haunted USS Hornet, and Oregon's Bigfoot.

Scarred by a history of piracy, brutal slavery, and bloody Civil War battles, the South is fertile ground for everything strange, unexplained, and paranormal.

Don visits Las Vegas where it is believed that the ghosts of Redd Foxx, Liberace and others reside. A miner haunts a ghost town, The spirit of a construction worker makes himself known at the Hoover Dam, and other paranormal activity in the Western United States.

Meet more than just a few "living" remnants along the most historic road in America's history.

Every good theater has a ghost, join us as we peer backstage at some of the country's most haunted theaters.

From Scotland's Loch Ness to Vermont's Lake Champlain, witnesses tell terrifying tales of prehistoric, long-necked creatures that inhabit the waters.

This episode features large images that are visible only from the air, like crop circles, Stonehenge, and the Nazca Lines.

This episode features research on Bigfoot in Northern California, Texas, and Florida, where it's known as Skunk Ape.

The Loch Ness Monster, The Lake Champlain Monster, Bigfoot, Mothman, and the Jersey Devil are all investigated, including the Men in Black's involvement with Mothman.

This episode features the mysteries of Machu Picchu, Peru and Sedona, Arizona.

This episode features people who witnessed alien encounters around the world.

From the magnificent carved symbols of Scotland's Rosslyn Chapel to mysterious codes hidden in books and monuments across England, we’ll track down secret clues to find out what the Holy Grail actually is and where it might be concealed.

Most of the paranormal attention in New Mexico has focused on Roswell and the alleged alien activity there, but, there's plenty of unexplained phenomena to go around, and aliens aren't the only strange visitors to make their presence felt.

While the city is known for its spirit of democracy, there are ghostly spirits in the city that have elected to stay behind to have their voices heard.

Don travels to colleges where there may be portals to another world, including Notre Dame University. Also see Illinois State, where a phantom librarian works, and Keene State College, where mysterious noises come from a sealed dorm room.

See locations in Florida that are said to be haunted. Locations includes a tree that was used for hangings in Key West, a pub with a British ghost in Palm Beach, and a hotel in Clearwater with a gem-stealing ghost.

From Mexico's Yucatán Peninsula south to Belize, the Maya vanished hundreds of years ago. But where did they go? And what did they know? Search the dense jungles, ancient ruins and underworld for secrets to help unlock the great mystery of the Maya.

We’ll visit the ghosts of Boston and beyond, whose presence and as much a part of the city's history as tea parties and beans.

Beyond the Sears Tower and the Magnificent Mile lies some of the scariest sites in America.