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Tony Armstrong is a Northern Irish born paranormal investigator and regular cast member of Northern Ireland's Greatest Haunts, broadcast on BBC1 from 2009 - 2010. He is a core member of the PSI organisation in Ireland, a group of sceptical investigators with the aim of investigating and providing an insight into paranormal claims in Ireland and further afield. Often referred to as the resident sceptic within PSI, he coordinates many of the technical aspects of the groups investigations.
