Ghost Adventures recall their creepiest lockdowns inside hotels of horror and the deadliest hospitals that they've investigated.

Team members Zak Bagans, Nick Groff and Aaron Goodwin decide to relive some of their most memorable, remarkable and compelling lockdowns, which involved the wicked spirit of a woman, houses of terror and bloody battlefields.

Zak, Nick and Aaron delve deep into the dingy Shanghai Tunnels in Portland.

The guys explore an unsolved murder at the Peabody Mansion in Denver.

Zak, Nick and Aaron engage in a two-part lockdown in the town of Bisbee.

Zak, Nick and Aaron return to Nevada City to investigate a hotel and caves.

Zak Aaron and Nick return to the Linda Vista Hospital to conduct a dangerous experiment they have not tried before to try to communicate with the apparition Nick saw last time. Featuring Chad Lindberg.

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 explore the Riviera Hotel with a few special guest stars.

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.

The crew are in Kent, England, inside Fort Horsted; the guys recruit locals to conduct a séance to provoke the demonic spirits that terrify visitors at the fort.