Zak invites Bobby Mackey's employees to Vegas to rehash the past, and new evidence's revealed of a dead caretaker talking to staff. Zak helps a former maid at Brookdale Lodge to overcome a dark force still terrorizing her.

Zak reopens investigations at the Villisca Axe Murder House and Letchworth Village. A skeptic describes a spirit scratching her at Villisca, and Zak interrogates a young man, who's addicted to dark entities plaguing Letchworth.

Zak revisits investigations in Salem, MA, New Orleans and the USS Hornet. He learns how witchcraft played a big role in his previous lockdowns, and he asks voodoo queen Bloody Mary if she put a curse on Aaron back in 2013.

Zak reopens investigations at Sedamsville Rectory and Winchester Mystery House. He learns his groundbreaking experiment at Winchester two years ago resulted in unforeseen and dire consequences for those involved.

Zak learns newly discovered, groundbreaking historical information from the owner of the Palmer House Hotel, and employees at the Mustang Ranch believe a new dark entity attacks the workingwomen.

Zak reopens investigations at Yorktown Hospital and Trans-Allegheny Lunatic Asylum. The asylum's owner reveals that new paranormal activity has surfaced as a direct result of the guys' historic live investigation in 2009.

Zak reopens investigations at the iconic Lizzie Borden House and Black Swan Inn. He listens to bold claims of sexual assault at the Borden House and believes that the slandered spirits are attacking people in protest.