The TAPS team checks out the haunted Lisheen Castle of Ireland, where mummies are said to still roam the basement; and, they also check out Viaduct Tavern, a bar built over an old debtor's prison.
The Hellfire Caves were homes to Hellfire Clubs, which might have been fun 18th century gathering places or sites for demonic rituals.
TAPS takes their new trainee, Kris, along to investigate Northern State Hospital, a closed psychiatric hospital in Washington State. Then they descend below the streets of Seattle to explore the tunnels below the city.
TAPS heads to San Francisco to investigate claims of activity at the Presidio. Then they talk to a family who believe that an old employee and family friend is still coming to work 20 years after her death.
The Gibbons family, in Seattle, WA, ask TAPS to investigate their home. The whole family has been having seemingly paranormal experiences ever since their orphaned niece has come to live with them.
The congregation at St. Matthew's Episcopal Church, in Prosser, WA, has suggested that the Reverend Jennings invite the Ghost Hunters to come in to examine a number of strange sounds, smells, and sights. Back in New England, TAPS then goes to the Sprague Mansion in Rhode Island, a beautiful building with ghost sightings dating back to 1925.
Jason and Grant finally travel to Salem, the place that sparked Donna's interest in the paranormal. There they investigate the Lyceum Bar and Grill, which is built on land once owned by the first victim of the infamous Salem witchcraft trials. Then, when Jason must race back home due to a family emergency, Grant is left to direct the team in their investigation of the Hawthorne Hotel.