MonsterQuest

An expedition searches for Champ, a dinosaurlike creature that some say they have seen in Lake Champlain.

An expedition investigating a report of a Bigfoot attack at a Canadian fishing cabin finds blood and tissue samples said to be from the beast.

Investigating a rash of giant bird sightings in Illinois, Texas and Alaska during the 1970s; Indian beliefs in huge Thunderbirds.

An all-female expedition journeys to Washington state hoping to lure a Bigfoot within range of their cameras; scientists study Bigfoot evidence, including 1967 film footage.

Two expeditions try to trap mysterious dog-killers; a beast described as a mutant kills pets in Maine and Minnesota in 2006.

Mountain lion attacks on people make headlines across the U.S., but some people say they have seen something else: a mysterious big, black cat.

Expeditions travel from the Amazon to the Arctic Circle in search of giant freshwater fish; catfish large enough to swallow a child; trout as big as a boat.

Probing reports from Louisiana and Florida of the "Swamp Creature," a red-haired beast that stands 7 feet tall and smells like rotten eggs; tracking the creature with bloodhounds.

Soviet dictator Josef Stalin may have planned to cross humans with apes; mankind and Mother Nature try to combine the intelligence of humans with the strength of apes.

A team searches the rain forest of Sumatra for mystery ape orang pendek, said to have a humanlike face.

Eyewitness reports from Wisconsin and Michigan tell of a tall and hairy man-beast described as a "dogman."