TV Guide American Heroes Channel Wednesday

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.

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

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

Often working under hazardous fighting conditions, combat engineers specialize in tasks such as diffusing explosives, building roads, and demolishing bridges.

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.

Green Beret Special Forces units are experts of unconventional warfare, and they are capable of operating under extreme circumstances.

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 prophecies that foresaw some of the most tumultuous events in history are studied, as well as some that have yet come to pass.

With the discovery of numerous earth-like planets in our universe, astronomers theorize we should be prepared for hostile, extraterrestrial life forms.

An exploration of how people prepare for the end of times, from the imperfect history of bible prophecy to the current approach of groups such as ISIS.

Nuclear war preparedness enthusiasts exhibit their survival bunkers and stockpiled supplies, determined to survive in the face of global annihilation.

A survival-minded group of individuals explains their plans to avoid becoming casualties of a global pandemic that could affect a vulnerable human race.

A huge, secret planet, which has caused mass extinctions in the past, has a gravitational pull so strong it could cause Earth to turn upside down.

An in-depth exploration is taken into Freemasonry, an organization in which most of the Founding Fathers and many presidents were members.

Brothels, one of society's most clandestine institutions, are examined, featuring a look into the secrets they have held and why they have endured.

An exploration is presented into the stories behind America's secret bunkers and how they have played an important role in history.

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.

An inside exploration is presented into the truth of the supposed UFO cover up and if there is actually a secret government that guards the truth.

An inside exploration is presented into the world of supposed outlaw bikers, featuring an in-depth look into their tightly-guarded clubs.

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 inside exploration is presented into the world of supposed outlaw bikers, featuring an in-depth look into their tightly-guarded clubs.

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.

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.

An inside exploration is presented into the truth of the supposed UFO cover up and if there is actually a secret government that guards the truth.