It's pedal to the metal as the guys revisit the Grand Canyon Caverns.

Cowboy hats and good cheer abound as Zak and the guys revisit their iconic return to Tombstone, Arizona. Click your spurs and grab your popcorn because this ghost hunt at the O.K. Corral is one for the history books.

It's anchors away for Zak and his crew as the Screaming Room looks back on their iconic investigation of a haunted ship where the spirits of stowaways still linger. Also Zak engages in some pirate cosplay.

Zak and the guys go back to the Boulevard of Broken Dreams to look for celebrity spirits.

Zak and the guys recount their visit to Eureka, Utah, where they encountered a bizarre ritual that opened the door to the scariest evidence they have ever recorded.

Zak and the guys review one of their most controversial episodes to date. They teach a hard lesson that not every paranormal report is true, and not every investigation leads to conclusive evidence.

Zak and the guys revisit the Enchanted Forest, an amusement park in rural Oregon where Aaron spent much of his childhood and where they encountered bizarre entities, including the spirit of....Humpty Dumpty?

The guys look back at their investigation of Ripley's Believe It or Not.

Tears are shed and painful memories brought to light as Zak and the guys revisit their final investigation at the Washoe Club in Virginia City, Nevada.

Zak and the guys look back on their otherworldly visit to an Arizona ranch where locals claim both aliens and demons have been terrorizing a machine gun-toting local, murdering livestock and NOT abducting a very willing Aaron Goodwin.

In an emotional return to one of their most-intense investigations, Zak and the guys look back at Goatman's Bridge, where Jay suffered a heartbreaking personal loss and both Zak and Aaron were affected by a dark, otherworldly presence.

Zak and the guys look back on their visit to a mysterious island in Mexico, where a man driven by grief and guilt assembled an army of Zak's greatest fear — dolls.

In a landlocked nautical adventure, Zak and the guys revisit the Titanic Museum in Branson, Missouri, where the precocious spirit of a six-year-old boy runs the halls of this spectacular replica of the iconic ship.