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UFO watchers report strange phenomena at a remote military site in Utah; bizarre beams of light; an astrophysicist charts mysterious cosmic rays.

UFO Hunters

Area 52

Reports relate instances of men in black, bent on silencing UFO researchers and witnesses to alien encounters; analyzing the only known photo of the men in black; a Utah site is rumored to be the base for a legend.

The Silencers

The team tries to uncover U.S. military forces' first responses to UFO encounters; investigating a claim that military helicopters pursued UFOs over Long Beach, Calif.; revisiting a suspected UFO crash site in Needles, Calif.

First Response

A growing phenomenon involves purported sightings of UFOs known as orbs, whose witnesses report experiencing odd dreams, premonitions and deep fear; the team investigates orb sightings in Arizona, Indiana and Missouri.

Dark Presence

The team investigates videos indicating a strong UFO surveillance presence at weapons laboratories.

UFO Surveillance

Investigating reports of UFO and USO activity in the Bermuda Triangle vicinity of the Atlantic Undersea Test and Evaluation Center said to be used by the U.S. Navy for weapons testing and underwater research.

Underwater Area 51

Investigating reports of a UFO spraying a strange blue mist in Pennsylvania; examining what are said to be UFO relics from the United States and Poland.

UFO Relics

The team analyzes the phenomenon of cows being slaughtered in the same strange and meticulous way around the world for the past four decades.

Alien Harvest

The team travels to Germany and Poland to investigate bizarre, centuries-old alien links that might be connected to technology unleashed by Nazi Germany during World War II.

Nazi UFOs

Satellite images show what appear to be underwater landing strips and other strange evidence in the wake of UFO sightings in Gulf Breeze, Fla., and reports from Cuba reveal unidentified submerged objects rising from the ocean.

Underwater Alien Bases

People recount their stories of encounters with grey aliens; an astrobiologist analyzes artist renditions of greys to try to determine what planets the creatures might inhabit; 900-year-old skull found in Mexico.

The Greys Conspiracy

Stories about a massive UFO coverup, cattle mutilations, a shootout with aliens and a secret underground base have made Dulce, N.M., a mecca for UFO enthusiasts.

Underground Alien Bases

Bill Birnes, Ted Acworth and Pat Uskert investigate UFO cases around the world.

S3 E4 | Underwater Alien Bases