Rylan Clark-Neal leads a team of celebrity ghost-hunters on a tour of Europe's most haunted houses. Ireland's Wicklow Gaol is the site of 300 years' worth of torture, starvation and death. The team search the dungeon and cells for signs of the supernatural, but they are too terrified to spend the night in certain parts of the building.

Built to defend the region from the English, local legend says a former resident haunts the North Tower. Will the celebs experience the strange occurrences reported for themselves?