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The guys explore the origins of Halloween during a trip to Ireland, where they search for evidence of ghosts, banshees and other satanic elements while visiting Leap Castle, Dublin's Hellfire Club, and Loftus Hall in Wexford.
The team investigate a nearly 170-year-old hotel with a history of murder and suicide when they visit Seguin, Texas, in the Season 10 finale. Included: The guys try a new magnetic microphone; and see a handprint mysteriously appear.