GHI invesdtigates a Belgian fortress in Antwerp and a 16th-century Italian villa.
The team looks into claims involving an abandoned girls' school in American Samoa.
The Mayan Ruins of Cahal Pech are investigated in San Ignacio, Belize, where a paranormal investigator takes part in a ritual to speak with the dead.
Italy's Fort of Fenestrelle is investigated this week.
GHI investigates claims of paranormal activity and legends of a magical stone at Peru's Chavin ruins.
GHI visit New Zealand's Napier Prison.
GHI travel to Norfolk, England to investigate Castle Rising castle.
Barry returns to Northern Ireland to investigate the former Limavady Workhouse, which was later converted into the Roe Valley Hospital before closing in 1997. GHI also visits Spike Island, nicknamed Ireland's Alcatraz.
GHI investigates a former leper colony on Trinidad's Chacachacare Island. Then they fly to Argentina to look into the claims of paranormal activity said to be caused by the ghosts of four murdered workers at the Frigorifico Meat Packing Plant.moreless
GHI returns for its third season in the rainforest of Trinidad to search for the spirit of Count Lopinot, a cruel slave master, who is said to rise from his grave at his former cocoa plantation La Reconnaissance.moreless
In the season finale, the GHI team returns to the New World to investigate several fortresses, both dating back to the 16th century, and Teatro Tapia, a 19th century theater.
Ghost Hunters International returns to Scotland to investigate a pair of haunted locations, the Inveraray Jail and the Usher Hall opera house.
GHI investigates Serbia's Petrovaradin Fortress.
The team investigates the Huissen House of Horror in the Netherlands and the Ijmuiden Fortress.
The GHI team investigate Germany's Fürsteneck Castle, where the a knight's unfaithful wife may still walk and call out to the living.
The GHI team go behind the former Iron Curtain to investigate Ukraine's Pidhirtsi Castle and Poland's Reszel Castle.
The GHI team, now led by Barry Fitzgerald and including long time Ghost Hunters alumni Kris Williams and Britt Griffith, travel to Denmark to investigate Kronborg castle. In its time, it has been a military stronghold to control the Baltic Sea, the conquered prize of the Swedes, and a prison.moreless
GHI travels to Honduras to investigate the stories of ghosts haunting the Fortaleza de San Fernando. Will the team find Spanish conquistadors still defending their post after hundreds of years, or the ghosts of the English pirates who briefly captured and held the stronghold?moreless
Joe Chin returns to assist GHI as they investigate the Nicaraguan El Coyotepe Fortress and infamous Carcel XXI prison.
The team travels to Norway, where they seek to discover the truth of a legendary White Lady stained by murder at Fredricksten Fortress. Then they investigate Estonia's "Old House", where the Devil was said to have celebrated his wedding!moreless
The GHI team travel to Poland to investigate Wolfsschanze, Hitler's headquarters on the Eastern front, which later was the site of the failed Valkyrie conspiracy.
The GHI team tackle a pair of cases in the United Kingdom. First, they travel to Wales' Margam Castle. Then they investigate The Ostrich Inn, a centuries old public house where the landlord's ghastly crimes later inspired the macabre musical Sweeney Todd.moreless
GHI travels to Nottingham, England and investigates the Galleries of Justice.
The GHI team investigates the Duran Sanatorium in Cartago, Costa Rica, and then flies to Montego Bay, Jamaica, to the Rose Hall Great House.
The GHI team visits a San Lucas island, where many of Costa Rica's worst criminals were sent from 1873 until 1991.
The GHI team remains in Tasmania to investigate a building that used to be the island's Supreme Courthouse. But its walls also had a darker purpose at one time- it was originally built to be a prison, and execution ground. Then they fly to Malaysia to investigate Kellie's Castle, a fabulous mansion built upon a tragedy- dozens of the Hindu workers died from sickness during its construction.moreless
The GHI team travels to Tasmania, where they investigate a haunted former prison.
The GHI team travels to Australia to investigate one of the most haunted sites in the country, Sydney's quarantine station.