River detectorist Beau Ouimette, TV presenter and keen swimmer Rick Edwards, and underwater archaeologist Gary Bankhead delve into the depths of Britain's watery past. Here, the trio find evidence from one of Scotland's bloodiest eras as they wade through the waters of the River Garry in the stunning Scottish Highlands.

River detectorist Beau Ouimette and presenter and keen swimmer Rick Edwards go in search of evidence of the clashing Scottish clans embroiled in the civil war that raged across the British Isles in the 17th century. Fights erupted during this period between the Royalists supporting the King and the Covenanters wanting more power for church and state. Starting on the River Lochy, situated in the shadow of Ben Nevis, the pair hunt for evidence of the 1645 Battle of Inverlochy - a pivotal fight that saw the Royalist army launch a surprise attack against the ill-prepared Covenanters.