The TWC board the USS Edson, a haunted battleship that served in the Vietnam War. Their goal is to free the spirits trapped aboard - including a disturbed poltergeist.

Jack pulls out all the stops to turn Sharon and Ozzy into believers with videos of ghost children, spooked pets, cloaked UFOs and a glitch in the matrix.

The team's epic overseas investigation takes them to Ireland's most haunted prison. Something strikes Dakota with a fear he's never experienced before.

Experts investigate evidence suggesting that one of the world's most elusive figures, the Yeti, lives in America and may have an otherworldly source.

Don Wildman investigates the legend of the Holy Grail, a golden fortune hidden under the ocean and an earth-shattering bonanza that changed the American west forever.

Josh Gates dives into a mystery below South America's Lake Titicaca. Josh discovers ruins from the ancient Tiwanaku people hidden in the lake's depths.

Josh Gates heads to the Scottish Highlands. His search focuses on a huge gold reserve hidden after the Jacobite uprising of 1745 and never recovered.

After being devastated by a powerful windstorm, it's all hands on deck as the town recovers. Mark must clear dangerously damaged trees before it's too late.

A bulldozer breakdown sends Jeremy on a high flying cross-country journey. When a wolf stalks Jenny, it's woman versus wild as she faces off with the fierce predator.

Images of Mercury reveal massive spider-like formations on its surface. Is it an odd geological formation - or something much more ominous?

How did pictures from the Hubble telescope make the comet of the century look like an alien spacecraft? Has earth already been invaded by alien organisms?

The team answer a Pennsylvania couple's call for help. They believe a cursed "witching tree" in the yard is behind the spirits haunting their 19th-century house.

Creig's camp is stunned after a bear attack, high winds wreak havoc and cause delays at Tom's build and Rich goes underwater to save his dock.

Creig's build struggles with the emotional scars of the bear mauling. Plus, Tom's surprise from the sky shifts the build into a new gear.

In 1962, three convicts try to escape from Alcatraz prison. Officials believe the men drowned, but a scientific experiment suggests they made it to shore.

In 2009, an Air France flight disappears, but could this tragedy happen again? After a huge area of Siberian forest is destroyed, it's a race to find the culprit.

The team are in Massachusetts to investigate the Bates Ship Chandlery. Psychic medium Cindy Kaza reaches out to angry spirits that haunt the property.

The team are in New York to investigate one of Hans Holzer's most famous cases, the Old Merchant's House. The property has a dark and scandalous history.

The Spirit Hunters travel to Prairie du Rocher, Illinois, to investigate the unusual activity happening at a bed and breakfast. What could be responsible?

The guys go to Montego Bay, Jamaica exploring an old plantation. Rumoured to be haunted by the infamous White Witch of Rose Hall, it has a history of murder and voodoo.

Josh ventures to Australia's island state of Tasmania. He investigates sightings of the supposedly extinct Thylacine, also known as the Tasmanian Tiger.

Experts analyse new evidence that could prove the Beast of Bray Road terrorised a Wisconsin town. Plus, is the human-wolf hybrid spreading across the US?

From a bridge in Vermont where a jilted teenage girl leapt to her death to a Tennessee intersection, historians and witnesses recount tales about haunted towns.