Monkman and Seagull's genius road trip concludes with a whistle-stop tour of some of Scotland's most enigmatic scientific achievements. Their journey begins in Edinburgh at the birthplace of a little-known scientist who changed the face of history, and ends at gigantic power station buried deep within a Highland mountain. First stop for Monkman and Seagull is the Edinburgh birthplace of one of their childhood heroes. James Clerk Maxwell has been dubbed 'Scotland's Unknown Einstein', and his pioneering work includes the 1865 theory of electromagnetism. Before heading west to Glasgow, Monkman and Seagull analyse a deep fried Mars Bar, and discuss the science behind this notorious Scottish snack. In Glasgow, Monkman and Seagull explore the Hunterian Museum's collection of antiquarian experimental instruments and delve into the personal correspondence of iconic scientist Lord Kelvin. A drive along the bonnie banks of Loch Lomond prompts them to stop and explore the science of skimming stones before their day ends at the picturesque town of Inveraray, home of an authentically-preserved 19th-century jail. Last stop on Monkman and Seagull's genius road trip through Scotland is the beguiling Ben Cruachan. This vast Scottish peak holds a dark secret - entering the mountain reveals its hollow interior, home to a gigantic hydroelectric power station.