Terrifying apparitions in a Texas swamp lead Josh Gates to send his team to the notorious Big Thicket. The area is crawling with venomous snakes but what really frightens Phil and Jess are mysterious Ghost Lights that have haunted locals for generations.

When Josh Gates receives new, potential video proof of a giant creature living in Lake Champlain, he sends Phil and Jess to investigate the 30-foot serpent that's been spotted in the lake for generations. A dangerous dive uncovers new evidence.