Season 4 kicks off with a probe of Philadelphia's Fort Mifflin, a garrison used during the Revolutionary and Civil Wars, concerning claims made by visitors and facilitators of the historic site.
The team probes the Burlington County Prison Museum, a historic jail in Mount Holly, N.J. Also: a Connecticut home is investigated regarding claims involving disembodied voices and objects that move of their own accord.
Phenomena attributed to Clapp Memorial Library and claims concerning a family home purportedly haunted over four generations are investigated in Massachusetts.
The team seeks out disembodied voices and apparitions of soldiers at Cashtown Inn, a bed-and-breakfast in Gettysburg, Pa., that once served as Civil War headquarters.
Prospect Place, a stop along the Underground Railroad in Trinway, Ohio, is probed regarding claims of phantom scents and spectral whispers. Also: the team tries to help a Massachusetts family purportedly plagued by shadowy figures.
The team probes three buildings at the Wright-Patterson Air Force Base in Dayton, Ohio, for claims concerning phantom typists, an elevator with a mind of its own and children's laughter---sans the children.
Paranormal claims concerning the Ruff Stone Tavern in North Providence, R.I., are probed. Also: the team visits New Hampshire's Mount Washington Resort, where the staff has encountered cold spots.
Nevada investigations put the team in the Goldfield Hotel. Also visited: the Old Washoe Club and St. Mary's Art Center in Virginia City.
Weston State Hospital, a former psychiatric hospital in West Virginia, is probed concerning claims made by volunteers who are restoring the facility.
A New England home is probed regarding claims made by the family. Also: the Palace Theatre, a former vaudeville destination in Manchester, N.H., is investigated.
Cape Cod, Mass., is visited for an investigation of the historic Colonial House Inn. Also: the team searches for spirits at California's Moss Beach Distillery.
Two probes in New Jersey have the team checking out the Proprietary House, home of the state's last royally appointed governor, along with a 19th-century mill.
"Hunt for a Hunter" winner Mark Fusetti joins the team as they search for Civil War-era ghosts on Pea Patch Island, home of Fort Delaware.
Iron Island Museum is probed in Buffalo regarding paranormal claims made about the former church.
Paranormal claims regarding Slater Mill in Pawtucket, R.I., are investigated. Also: Connecticut's Pettibone Tavern, allegedly the site of an axe murder, is probed.
A Rhode Island banquet hall, formerly an inn that was established in 1760, is probed regarding spectral sightings and claims of cold spots in the attic. Also: Groton, Conn., is visited for a home investigation.
A New York investigation has the team searching for apparitions in the Buffalo Central Terminal.
The team goes to Florida to probes claims concerning the Seven Sisters Inn and the Renaissance Vinoy Resort.
Oak Alley Plantation is probed in Vacherie, La.
An ancestral home is probed in Dayville, Conn., concerning claims involving a malevolent spirit; a winery is investigated in Appleton, N.Y.
Two Massachusetts probes have the team investigating claims purported in Springfield and Leominster.
"Eureka" star Colin Ferguson helps the team investigate the USS Hornet in San Francisco.
TAPS shares findings from the 2008 Halloween investigation of Fort Delaware in Delaware City.
TAPS recalls their favorite investigations. Host: Josh Gates.
Jason and Grant go to Fresno, Cal., to investigate claims concerning the Clovis Avenue Sanitarium.
The team boards ships docked off of San Diego to probe paranormal claims pertaining to the Berkeley, a 1898 steamboat ferry, and the Star of India, the oldest active ship in the world.
Portsmouth Harbor Lighthouse and Fort Constitution are probed in New Hampshire regarding claims of apparition sightings and other strange phenomena.