A Highland Fling with a Monstrous Thing is an episode of the television series The Scooby-Doo Show. It first aired October 14, 1978.
Description[]
The gang heads for Scotland to visit their friend Aggie MacDuff, whose family castle is being plagued by the ghost of her great-grandfather Finian McDuff. It seems the ghost plays his bagpipes to call on the Loch Ness Monster to help him frighten some guests away from the castle.