The Travel Channel HD

Jack and Katrina are in Flagstaff, Ariz., where they check into one of America's most terrifying hotels, and where patrons and staff reported unsettling encounters.

Jack and Katrina are drawn to the dark allure of Pennhurst Asylum in Pennsylvania; they enlist Heather Taddy to help investigate this infamous site, which has a long and dark history of inhumane treatment of its patients.

In Pennsylvania, Jack and Katrina uncover a theater's haunted history.

See how one company is changing people's lives by helping them put their tax problems to rest.

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Regain independence and enjoy greater mobility with the compact design and long-lasting battery of portable oxygen.

Connie Craig-Carrol & Founder Ken Meares investigates Omega XL, the ultimate all-natural solution for joint pain from inflammation.

A bed and breakfast in New Hampshire is home to vivid, lifelike apparitions.

Amy Bruni, Adam Berry and psychic medium Chip Coffey conduct a spiritual sweep of Fort Adams, a massive military structure haunted by dead soldiers and victims of various crimes but one lost and lonely spirit stands apart from all the others.

A Hollywood photographer is choked by the spirit of an angry sailor; an apparition lures a security guard to the scene of a deadly fire; a police detective discovers a missing woman seen by a passerby is actually dead.

A wrecking yard owner is shocked to see a ghost on a security camera, a retired schoolteacher's wife is attacked by a vengeful spirit and a mother and son search for a paranormal voice captured on a chilling audio file.

A bar owner resorts to an exorcism after his pregnant wife is attacked by an angry entity; a family seeks help after their dog is literally scared to death; a young boy is haunted by a ghost with evil intentions.

An evil spirit with a penchant for murder possesses a young boy; a man uncovers horrifying evidence that his wife is being attacked by a ghost; a couple encounters strange lights and voices at the site of a plane crash.

A mother discovers her daughter's imaginary friend is a demonic entity, a bar manager triggers a terrifying haunting when she unearths an old photograph and a family's new home is haunted by a long-dead inhabitant.

Mournful cries lead a woman to find a painful past sealed inside the walls; burlap masks in an old trunk hide a country home's dark secrets; tables are turned when the owner of a haunted attraction faces a ghost.

A man is tormented by bouts of unexplained blindness and horrific visions, a priest's life is forever changed after he encounters a demonic possession and a rookie police officer is shocked to find evidence of a haunting on CCTV.

An antiques dealer posts videos of his collectibles breaking on their own, a single mother discovers her real-life dollhouse is a living nightmare, and a teenaged girl and her would-be stepsister bond over a terrifying haunting recorded on her phone.

A lake monster stalks a group of swimmers; a security guard confronts a terrifying shadow person in an empty stadium; a college student is tormented by a ghostly roommate; a Russian man goes on the hunt for a Yeti.

A paranormal presence follows an investigator home; a UFO plays chicken with a freighter; a family captures evidence of Bigfoot; the ghost of a small child runs through a Savannah, Ga., cemetery.

Paranormal investigators get a chilling response from a dearly departed rock legend; a ghostly canine joins its former owner for a nighttime stroll; a man and his co-workers spot a gaggle of UFOs in the Louisiana bayou.

A shadow person in an abandoned Pennsylvania asylum; an Iowa couple accidentally brings home a haunted statue; a mom in Kentucky discovers a boogeyman hiding in her daughter's closet.

A shadow person lurks in a 911 call center outside Savannah, Ga.; fairies frolic in a Northern Ireland garden; a walking baby doll baffles residents in Saltillo, Mexico.

A shop owner in Mexico loses customers to a haunted piñata; a man in Russia is driven out of an abandoned house by an angry poltergeist; a woman is potentially a UFO magnet.

A father and son record evidence of a monster in a lake in Canada; a doorbell security camera captures fiery orbs falling from the skies above California; an investigative team is accosted by the spirits of a murdered family in Nevada.

A man is possessed by an evil entity during a séance in York, England; an Oregon woman is stunned by a glowing UFO; a ghost hunter is attacked by a poltergeist in a haunted nursing home.

A shadow person lurks in a 911 call center outside Savannah, Ga.; fairies frolic in a Northern Ireland garden; a walking baby doll baffles residents in Saltillo, Mexico.