Zak, Nick & Aaron are in Kent, England, just southeast of London, hunkering down inside Fort Horsted. The guys recruit locals to conduct a séance to provoke the demonic spirits that terrify visitors at the fort.

Zak, Nick & Aaron explore the Hellfire Caves outside London, England, where they recreate past secret pagan rituals and conjure the spirits of 18th-century English royalty, who are said to still roam the catacombs.

Zak, Nick & Aaron explore the Riviera Hotel in Las Vegas, NV, with special guests Mötley Crüe singer Vince Neil and poker champion Jamie Gold, to evoke the spirit of Frank Sinatra in his old penthouse suite.

Zak, Nick & Aaron help paranormal inventor Gary Galka and his family find closure after the tragic loss of Melissa, Gary's daughter, by celebrating her birthday. The team records audio evidence derived from Melissa's spirit.

Zak, Nick & Aaron revisit the horrifying Linda Vista Hospital to contact a spirit of a woman that Nick saw reach out to him in 2009. The guys experiment by building an electrified ghost chamber hoping to manifest the apparition.

Zak, Nick & Aaron return to Nevada City to investigate The National Hotel as well as an underground cavern. Things get eerie when Aaron discovers a door spontaneously unlock and open.

Zak, Nick and Aaron engage in a 2-part lockdown in the town of Bisbee, AZ. The guys hear horrifying screams at the Oliver House, and then Nick sees a curtain spontaneously move at the Copper Queen Hotel.

Zak, Nick & Aaron attempt to uncover the truth behind an unsolved murder at the Peabody-Whitehead Mansion in Denver, CO. UFC fighter Brendan Schaub joins the guys, and things heat up when a spirit calls out Brendan by name.

Zak, Nick & Aaron delve deep into the dingy Shanghai Tunnels to unearth the spirits that still haunt Hobo's Restaurant in Portland, OR, and collect some compelling visual evidence.