In the final episode of the season, Ben, Larry and Chi-Lan travel down to the Louisiana Bayou in search of the legendary Honey Island Swamp Monster. They put some popular theories to the test but before they can render a verdict, an unusual sound lures them into the woods. Meanwhile, Bill, Austin and Jael head to Portland Oregon to investigate a strange light hovering over the haunted Willamette River. They attempt to replicate the lights by launching a variety of illuminated objects into the night sky and are surprised by the results.

In the season premiere episode, the team investigates the mysterious case that many people believe marked the very beginning of UFO government cover-ups -- the historic Battle of LA.

Bill, Chi-Lan and Austin head to Jacksonville to investigate a video of a ghost sitting in the balcony of the haunted Florida Theater. When a shocking heat signature registers on their thermal cam during the night investigation, the team goes on a wild ghost chase! Meanwhile, when a mysterious triangular formation of lights appears in the skies over both New York and Texas within a few days of each other, Ben, Jael and Devin head to El Paso to see what they can uncover. After launching a series of lights and pyrotechnics into the sky, the team makes an important discovery that may break the case.