The episode examines the various theories regarding Spontaneous Human Combustion (SPH), a case where a human body appears to have been completely burnt to ash from the inside out. Theories like the existence of pyrotrons in the body, poltergeists, ball lighting in the atmosphere, to the wick effect are examined.

The episode presents footage and anecdotal evidence from people who claim to have had close encounters with the 1st, 2nd, 3rd, and even the 4th kind. Scientists and astronomers provide scientific reasons to rebuke these claims.

The Lemp Mansion is considered to be the most haunted house in the world. It is closely examined in this episode. Also scrutinized are film and photographic footages of so-called ghost (spirit photography). Learn of the results from a human psychological test conducted in Scotland’s most haunted underground chambers. And find out how well a ghost chaser did when tasked to find a ghost.

Listen to various accounts of ‘Sasquatch’ sightings reported by residents and visitors in the town of Willow Creek, California. Re-examine the famous 1967 footage of Bigfoot. Also follow investigators as they go on stake-out in the forest of Eastern Texas. And discover how some or most of this Bigfoot evidence may have been fabricated. He's tall, he's dark, and he's having a bad hair day from hell. His cousins have been spotted from Australia to the Himalayas. But exactly who, or what, is "Bigfoot"? Is there a giant primate running around the world's wilderness areas? Or is Bigfoot a figment of the imagination? In 1967, a piece of film footage purported to capture is image. Follow the forensic trail, examine the footage, and experience a real Sasquatch stakeout as science goes after that elusive legend.

There have been numerous reports of sightings of sea monsters in the waters of the San Francisco Bay, Scotland’s Lake Loch Ness, and British Columbia’s Lake Okanagan. In this episode, photographs and film footage of these sea monsters are re-examined to reveal the truth behind their existence.

Animals have been observed to exhibit odd behavior prior to a disaster, from becoming agitated to making a quick dash for safety. This was clearly demonstrated during the 2004 Indonesian tsunami when local wildlife generally escaped harm. Some scientists believe that the animals are sensing physical changes that we simply aren't sensitive enough to detect. Others, however, believe they have psychic powers of prediction.

Superhuman Powers examines the truth behind the claims made by people who express having attained supernatural powers. These include self body mutilation, levitation, and so on.

Discover the real story behind the 1973 horror film ‘The Exorcist’. Meet some of the people who claim to have exorcised evil spirits from people, objects, places and animals. The episode also reveals the likely explanations for the behavior of those suspected of being possessed.

In 1978, a crop circle first appeared on a farm in England’s West Country. Since then crop circles have appeared with larger frequency and complexity. The episode reveals some of the theories that explains its existence, and provides behind the scenes look at some of the footages of balls of light that appear to make this crop circles. A group of artist called the ‘Circle Makers’, are also tasked to create a crop circle within 5 hours.

Are psychics real? Viewers are introduced to various cases where people have claimed to have made successful psychic predictions. Skeptics however disagree. A test is done to compare the effectiveness between cold readings, geographical profiling, and calculated guesses. A self proclaimed psychic is also given a task to find a mother and child gone missing 28 years ago.