Monsters and Mysteries in America

Alaska: could its uninhabited frontier be hiding monsters and mysteries? For the first time, witnesses tell the stories of their encounters with the unknown: Bigfoot, lake monsters and UFOs - all under the scrutiny of a top microexpressions expert.

An investigation into reports of UFO encounters in the United States. Included: an alien attack in Appalachia; a man claiming he was abducted as a child; and twins in New England that allege they were taken by extraterrestrials.

Investigating the appearances of man-like beasts across the U.S., beginning with the Mothman in West Virginia. Also: a family's alleged encounter with the Ohio Grassman; and a look at possible evidence for the existence of the Lizard Man of Scape Ore Swamp.

Mysterious men in dark suits are said to threaten witnesses and destroy evidence of extraterrestrials.

In the late 1960s, the town of Point Pleasant, W.Va., is besieged by a series of monstrous creatures, UFOs and mysterious men in black.

Chilling encounters with the Sheepsquatch in Kentucky; the Batsquatch reigns terror from the skies in the Rio Grande; evidence of a sasquatch in the Pacific Northwest.

Encounters with a mysterious bigfoot from outer space; Florida's skunk ape; a hairy beast in Missouri called Momo.

Warring bigfoot in the Sierra Mountains; a Wendigo transforms men into cannibals in Michigan; Ohio Grassman.

A couple reveals details of an abduction; helicopter pilots find themselves in combat with a UFO.

Two men in South Carolina survive an alien abduction; twin sisters are used as breeders for aliens.