World's Greatest Mysteries

S1 E37: Devil's Triangle: Portal or Peril?

Original Air Date: Nov 1, 2017

Investigators try to separate fact from fiction regarding the Devil's Triangle and its green fog.

S1 E36: Easter Island Talking Boards: Natural Emigration or Hidden Habitation?

Original Air Date: Nov 1, 2017

Examining hieroglyphics and "talking boards" for clues about where Easter Island's inhabitants came from 1,700 years ago.

S1 E32: Inca Civilization: Defeated or Diseased?

Original Air Date: Nov 1, 2017

Investigating whether the advanced Inca Empire was vanquished by a handful of Spanish conquistadors or disease.

S1 E26: Bigfoot: Living Creature or Legendary Lie?

Original Air Date: Nov 1, 2017

Probing whether Bigfoot exists with an eyewitness account and scientific analysis of footprints.

S1 E22: Biblical Prophets: Amazing Accuracy or Coincidental Occurrences?

Original Air Date: Nov 1, 2017

Investigating whether ancient prophets really had the ability to foretell the future.

S1 E21: Dolphins: Stray Noises or Intelligent Communication?

Original Air Date: Nov 1, 2017

Studying the intelligence of dolphins and whether their noises are a form of communication.

S1 E19: Medical Mysteries: Ancient Healers or Modern Technology?

Original Air Date: Nov 1, 2017

Ancient methods and medicines might eliminate some of today's most life-threatening illnesses.

S1 E8: Phoenix Lights: UFO Flyovers or Military Test Flights?

The 'Phoenix Lights' sighting lasted for three hours and was witnessed by thousands of people.

S1 E3: Butch Cassidy: Demise By Bullet Or Old Age?

Legend says Butch Cassidy and the Sundance Kid survived and returned to the United States.