The Ghost Adventures team heads to Boise to investigate the Old Idaho Penitentiary. The prison once housed killers destined for the gallows, and even though the criminals may be gone, their spirits remain locked behind the high stone walls of the prison.

The Ghost Adventures team travels to Scotland to investigate the Edinburgh Vaults. The city is steeped in history and hauntings, but no landmark holds as many ghosts as the rooms and passageways under South Bridge.

Zak, Nick and Aaron go to New Jersey to investigate an abandoned psychiatric hospital. This hospital once housed thousands of mentally ill patients, many of whom died due to poor conditions. Witnesses have reported disembodied voices and dark shadows there.

Zak leads the team to Birmingham, AL, to investigate Sloss Furnaces. Built in 1881, this factory was a dangerous place to work. Many workers died and many more were injured. It's the souls of these workers that are believed to inhabit and haunt the factory.

The Ghost Adventures team travels to West Palm Beach, FL, to investigate the Riddle House. Formerly used as a funeral parlor and home to cemetery caretakers, the house has seen its share of death and dark haunting.

Zak, Nick and Aaron go to Moundsville, WV, to investigate and confront the tortured souls that remain inside the abandoned Moundsville State Penitentiary. The prison was mired by evil, torture and death for over a century.

Ghost Adventures head to North Adams, MA, to investigate the Houghton Mansion. The Houghton family experienced several tragic deaths there. Later, the mansion was sold to the secretive Masons, and they have experienced numerous paranormal events.

Zak leads the team to Wilder, KY, to investigate Bobby Mackey's Music World. With a history full of murder, suicide and satanic cult activity, this nightclub has become known as "Hell's Gate."