Discovery Channel

Rachel, a survivalist from "Naked and Afraid of Love," and Na'im, an outdoorsman from Colorado, take on 21 days in the rugged wilderness of Argentina, but freezing nighttime temperatures may push them to their limit.

For the first time ever, two Naked and Afraid crew members attempt to survive 21 days in front of the camera. But faced with swarms of unrelenting insects and a lack of food, this history-making duo is about to get a taste of their own medicine.

An ICU nurse and a banker attempt a 14-day fan challenge in the rugged Mexican jungle; as food becomes scarce, they question their will and skill to make it to the end.

Tony ambushes Rick with a secret offer. With high hopes, Parker's crew fires up a fourth plant in the Quagmire Cut. Buzz bets on White Channel pay.

Drew hunts for architectural salvage at a 16th century castle; in London, a prop hire company's items are all out of reach.

Modern-day treasure hunter Drew Pritchard travels across the country to Lincolnshire.

A mother lode of carnival memorabilia at an entertainment complex.

Drew hunts for architectural salvage at a 16th century castle; in London, a prop hire company's items are all out of reach.

Modern-day treasure hunter Drew Pritchard travels across the country to Lincolnshire.

A mother lode of carnival memorabilia at an entertainment complex.

Drew hunts for architectural salvage at a 16th century castle; in London, a prop hire company's items are all out of reach.

Phil and Jess explore the world's most haunted forest near the site of the Dracula legend and where Josh Gates had his most terrifying experience; during a night investigation, Jess finds herself being watched by someone or something sinister.

Josh Gates and fellow paranormal researchers Phil and Jess investigate a decaying mental hospital in Detroit where reported hauntings threaten all who brave its abandoned halls.

After capturing an unknown entity on film, Josh Gates and his team attempt to communicate with spirits that still reside in the asylum -- including the ghost of a 10-year-old girl who drowned during a freezing hydrotherapy treatment.

The team heads to Alaska, America's last frontier, to investigate reports of a murderous Sasquatch; Phil and Jess travel deep into the wilderness and have a truly hair-raising close encounter with what locals call "The Hairy Man.".

In the aftermath of Japan's 2011 Fukushima nuclear disaster, citizens began reporting something truly amazing: UFOs; Phil and Jess enter a radioactive wasteland to discover the stunning truth behind these extraterrestrial encounters.

Zak and his crew push higher atop Casper Mountain into the world of storied witches; their investigation leads to a haunted forest where annual summer solstice rituals may have opened a gateway to another dimension.

Zak's team travels to Pomona, CA, to assist a veteran who believes a demonic presence has overtaken his American Legion post; the paranormal activity has scared away fellow veterans, and he needs help to regain control of the facility.

Zak Bagans' team journeys to the heart of Mexico to document an exorcism firsthand; demonic possessions have risen at an alarming rate in the Mexico City area, throwing it into spiritual chaos.

Zak Bagans' team documents paranormal threats across the globe; in Wales, past injustices haunt an ancient inn; in Costa Rica, a mysterious cult may have conjured up the deadly La Llorona at a hotel.

Zak Bagans' team documents unsettling spirit communication in an Indiana sanitorium before stepping inside a Romanian prison were real-life horrors fuel supernatural nightmares; the souls of all who perished in these dark destinations could be freed.

Zak Bagans' team journeys to the heart of Mexico to document an exorcism firsthand; demonic possessions have risen at an alarming rate in the Mexico City area, throwing it into spiritual chaos.

Zak Bagans' team documents paranormal threats across the globe; in Wales, past injustices haunt an ancient inn; in Costa Rica, a mysterious cult may have conjured up the deadly La Llorona at a hotel.