The Unexplained Files - Season 2

What can explain the grisly deaths of nine students who went missing in Siberia? New investigation of declassified Soviet files reveals evidence of their horrifying ordeal, and scientists examine clues that may prove the existence of a yeti.

For the first time, a participant in the real exorcism that inspires the movie The Exorcist reveals his experience. Then, over 100 elk are found dead. All died in the last 24 hours, but the cause of death is a mystery.

Alien Skull: In Peru a tiny skeleton resists medical explanation. Is it a missing link in human evolution? Or proof of extra-terrestrial contact? Baltic Sea Anomaly: Wreck detectives ind a huge disc twice the size of a football field on the seabed.

Ex Deputy Sherriff Chuck Zukoswki has been investigating phenomena across Middle America for 25 years. Now he spots a pattern: eye-witness reports of UFOs along the 37th degree parallel, the 3000 mile long line that runs through the heart of the U.S.

The Flannan Isles Lighthouse Mystery: Three lighthouse keepers all disappear. How can three people vanish from a tiny island without a trace? Aleshenka: A Russian Police Captain is shocked to be handed what looks like a mummified alien baby.

Death from the Sky: A dead body mysteriously appears as if it has fallen from the sky. Could this be Britain's first case of alien abduction? Mexican Chupacabras: In Mexico, hundreds of vampire-like attacks leave livestock drained of their blood.

Bosnian Pyramids: An amateur archaeologist, claims he has uncovered five gaint pyramids in Bosnia. Russian Serpent: For centuries, strange reports of a large, underwater creature have come from people living near the remote Lake Labynkyr in Siberia.

Are UFOs targeting sensitive nuclear weapons sites? If so, why? Across the globe senior military personnel witness UFOs above nuclear weapons bases, and in some cases UFOs are reported to shut down nuclear missiles.

Lost Giants: In Borjami Valley a team of experts uncover bones they believe belong to a human over 9 feet tall. Bridge of Death: The 19th century gothic Overtoun Bridge in Scotland appears to be haunted, causing dogs to jump to their death.

Is there danger in our skies? Across America run-ins between planes and UFO's are reported, sometimes with terrifying and tragic consequences. Is the government covering up the truth behind these encounters?

Voodoo Zombies: Could modern day claims of zombie existence in Haiti be definitive proof that the myth of zombies is in fact a reality? Life After Death: Patients experience strange and uncharacteristic effects after life saving transplant operations.

Shadow People: Derelict reform school Preston Castle appears to be haunted by Shadow People, a phenomenon increasingly reported in the US. The Sun Miracle: Above the town of Medjugorje, hundreds of witnesses claim the sun is defying the laws of nature.

There are global phenomena that science cannot explain. Credible eye witness reports of UFOs, shocking discoveries of mysterious beasts, inceased reports of paranormal and demonic activity. New investigations question unexplained happenings.