An examination is presented of some of the world's most iconic, clandestine institutions and top-secret locations, featuring a look into Las Vegas.

An in-depth and behind-the-scenes examination is taken into the American Nazis, an infamous group who terrorized the United States in the 1930s.

An in-depth examination is taken into the possibility that aliens built the pyramids and the controversial writings of Swiss author Erich von Daniken.

An in-depth and behind-the-scenes examination is taken into the secrets that surround some of the United States' Founding Fathers.

An examination is presented into some of the world's most iconic and clandestine institutions, featuring a look into some of America's most infamous cults.

A look is taken into some of the world's most iconic institutions and stories, featuring the United States' quest to create super soldiers during the Cold War.

An examination of where most of today's gold is located, and who holds the ownership rights to this precious metal, long treasured and fought over by man.

Alcatraz is explored, featuring a conspiracy that helped three inmates escape, the truth behind the dungeon and a look at the remnants of a military outpost.

The Vatican is one of the most secretive institutions on earth, protecting not only its elite reputation, but it's faithful members, with reckless abandon.

The Mutual UFO Network uses science, psychology and law enforcement to carefully investigate people's personal accounts of UFO sightings and alien abductions.

While investigating a series of mass sightings in three Mexican cities, the members of a UFO investigation team encounter conflicting stories and evidence.

In a Philadelphia suburb where reports of UFO sightings have recently increased, MUFON investigators search for sightings that can possibly be verified.

The United States Army Rangers are a specialized light infantry special operations force that has fought in every major conflict from D-Day to Baghdad.

Historians and experts discuss in detail the history behind the French Foreign Legion and the soldiers who come from all over the world to become Legionnaires.

The Royal Marine Commandos are the United Kingdom's military chameleons who specialize in amphibious, mountain and arctic warfare.

The elite special operations forces of the U.S. Navy SEALs have developed diverse tactics for unconventional warfare since the unit was created in the 1960s.

The program takes a close look at the SAS, a British Special Forces unit that fights behind enemy lines and has revolutionized the war on terrorism.

Historians and military experts discuss in detail the history of Special Forces teams and the training that members must undergo.