An expedition tries to tag the first great white shark in the Atlantic.

The team investigates witnesses' claims of attacks by a terrifying monster in Kentucky.

Giant pythons have been spreading rapidly in Florida since 1992's Hurricane Andrew.

Examining how giant killer bees from South America are spreading northward into the United States.

Investigating sightings of a giant winged monster known as "Mothman" across America.

Investigating the appearance of South American piranhas in U.S. lakes and rivers.

A humanlike beast with reptilian skin, reportedly, has been terrorizing a town.

The team investigates reports of aggressive and territorial packs of sasquatches in California.

The team heads into Midwestern forests to investigate werewolf sightings.