Zak and the crew travel to Casper, Wyoming to investigate local reports of UFO sightings, alien abductions and hauntings near an ominous mountain and abandoned military base. Will a massive storm prevent the team from unraveling the mystery?

Zak and his crew push higher atop Casper Mountain into the world of storied witches. Their investigation leads to a haunted forest where annual summer solstice rituals may have opened a gateway to another dimension.

Zak and the crew gain access to an abandoned medical complex in Downey, California. Most of the buildings were recently leveled, but Zak suspects that tunnels under the complex could be funneling a dark energy to the buildings that remain.

Zak and the crew gain access to a shuttered Pasadena, California, hospital that has become a hotbed for devil worship; Zak suspects the evil originated with a heinous murder nearly 25 years ago.

Zak and crew investigate reports of phantom footsteps, laughter, and spectral figures at a San Diego amusement park. The guys discover a dark cloud of death hangs over this beloved establishment that has entertained millions for 100 years.

In Reno, NV, Zak helps a couple consumed by overwhelming darkness while renovating the abandoned River Inn, causing them to sleep in an RV.

The crew investigates reports of demonic possession in Jamestown, California.

Zak and crew arrive in historic Pendleton, Oregon, to investigate dark hauntings in its storied subterranean tunnels. Has a history of death, misery and hatred fed the negative energy snaking its way beneath this seemingly peaceful town?

The crew continue their terrifying investigation of historic Pendleton, Oregon. A tip from a local sends the team to an unexplored section of the town's mysterious tunnel system that may bring more shameful secrets and a curse to light.

The team helps a family that has been driven from their home by a malicious entity. Their misfortunes began when they took in a doll from a hoarder's home. Zak fears that whatever inhabits the doll is responsible for a mysterious fire.

GAC are summoned to a Los Angeles mansion where recent restoration efforts have awakened a sinister presence. With each step, the team risks falling prey to a dark attachment that threatens to follow them beyond the historic home's walls.

Zak and the crew roll into a Wild West town to confront a posse of volatile spirits that are tormenting the living. The many deaths from this desert outpost's lawless past has infused the very rocks with a dark, powerful energy that cannot be contained.

Unsettling paranormal events near an exhibit of serial killer Samuel Little prompt Zak to investigate his own Las Vegas museum. Are the events connected to Little's recently acquired remains, and could the lockdown reveal clues to his unsolved murders?

Two abandoned buildings in Nevada show signs of disturbing activity.