The final leg of their adventure takes them to a snowy Northern Ireland where they begin with a challenging dip in the freezing sea of the causeway coast as they empathise with legendary Selkies – mythical creatures that shape shift from seals to human form. At what’s reputed to be Northern Island’s most haunted hotel, Martin and Roman spend a fretful night, before exploring the Irish origins of Halloween and experiencing the spectacular Derry Halloween Festival – Europe’s largest.