Sunday

Bigfoot is everywhere you look, but why are so many millions of Americans obsessed with this mysterious man-ape? This episode sheds new light on some of the nation's darkest Sasquatch secrets. Recent discoveries of previously unknown hominids and breakthroughs in genetic technology have given a nation of Bigfoot believers new hope that this creature will be found, but what new technologies are being developed for this centuries-old hunt? We'll join Steve Kulls, the "Squatchdetective" on a nighttime expedition for Bigfoot plus gets a first look at "The Falcon Project" -- a revolutionary new air ship that plans on taking the hunt 3,000 feet up into the sky. But what are U.S. citizens legally allowed to do if they do happen to encounter a Bigfoot? The answer may surprise you!

Over the last century there have been four successful presidential assassinations and a multitude of failed attempts. But do we know the real story behind these assassination plots? We'll look behind the headlines to the conspiracy theories that surround the most shocking murders in American History. What do John Wilkes Booth, Leon Czolgosz, Charles Guiteau, Lee Harvey Oswald and John Hinckley Jr. all have in common? According to experts, they were all mentally unstable. While this may explain their deranged obsession to kill the President, others believe this is evidence that all were patsies to a larger conspiracy. Former secret service agents reveal the secret methods used to safeguard the President of the United States. Bill O' Reilly reveals the elaborate conspiracy behind the murder of President Abraham Lincoln. And bestselling author Ronald Kessler examines whether an assassin could even infiltrate the Secret Service itself.

American treasure hunters are convinced that there are missing fortunes just waiting to be discovered all around the country. But is it a harmless hobby, or do treasure hunters find themselves locked in a battle with other searchers--or even the government? We'll investigate the deepest mysteries of missing millions. From secret stashes of Confederate gold bullion, to silver coins and antique weapons, treasure hunters are scouring the country for hidden clues that might lead them to untold riches. How do they decode encrypted treasure maps? In 1971, $200,000 went missing in America's only unsolved airplane hijacking. Can following the money help to uncover the true identity of mysterious hijacker D.B. Cooper? Could secret agreements with criminal art dealers help the FBI to solve America's biggest art heist? Is it possible that even our country's history is under threat from thieves and crooks?

No club in America is more secretive than the Hells Angels. Members are forbidden to publically discuss their biker brotherhood and others who have "insider" information are too afraid to talk... until now. Get the real story about the Hells Angels from all sides--from motorcycle world insiders to club infiltrators to law enforcement officials. Special Agent, Jay Dobyns, exposes the shocking reasons why he feels the U.S. government is failing in the war against motorcycle clubs. Charles Falco, a government informant now in the Witness Protection Program, divulges the secrets he learned about the Hells Angels during the time he spent as an undercover outlaw motorcycle gang member. How were the Hells Angels able to transform themselves from a small crew of California bikers, dedicated to booze and babes, to an international criminal syndicate--one the FBI says poses a threat to six continents and a corporation worth millions of dollars?

It is one of the most secret organizations in America. A religion--based on the cosmic revelations of an inspired genius--that boasts more than 100,000 faithful followers throughout the world. We'll reveal the hidden origins, strict doctrine, secret language and celebrity allure of the wealthy and influential institution. Former Scientologists disclose the reasons they were drawn to the church--and why they left. Jenna Miscavige Hill, niece of Scientology's current leader, David Miscavige, describes her difficult experiences inside the organization. Former church executive, Mark Rathbun, demonstrates Scientology's most revered spiritual technology--the "E-Meter." And watchdog Tony Ortega explains the appeal of Scientology that draws in new members. Find out why some consider Scientology a spiritual choice and others consider it a road to ruin.

A visit to a chimpanzee sanctuary in Sierra Leone turns to tragedy as a group of friends are thrust into a brutal fight for their lives, and a father clings to life after being bitten by a European viper.

On a remote Alaskan Island, Dr. John Raster's annual vacation turns to horror when he is mauled by a brown bear. Deep in the South African bush, hundreds of miles from safety, a deadly black mamba strikes wildlife researcher Danie Pienaar.

In Florida, a lakeside celebration turns tragic when Kasey Edwards is attacked by an alligator. In Australia, Bruce Campton and accepts a job with catastrophic consequences after he is struck five times by a death adder.