Dr. Langeskov and the you know what (NES edition)

Its the hottest summer on record, and all across Europe, valuable objects are disappearing. Museum curators unlock cabinets and find precious artefacts stolen. Wealthy mansion owners wake up to see their priceless paintings have vanished from the walls. One things clear: a master thief is touring the continent and the police are left scratching their heads. … silently cross the darkened lawn of the mansion… … hold tight to the tranquiliser gun in your pocket, and commit the most audacious heis--...