Rick and Beau venture out to learn more about the historic Battle of Culloden. They go along the River Nairn and try to find clues about where Bonnie Prince Charlie might have crossed the river while fleeing from the British government.

Rick Edwards and Beau Ouimette head to North Wales to investigate waterways that may contain signs of the medieval Welsh Rebellion.

Rick Edwards and Beau Ouimette look for evidence of Roman life in Scotland, heading to Ardoch Fort in Perthshire, on the east bank of the River Knaik.

The team search the Cock Beck in North Yorkshire, which runs close to the location of one of the bloodiest battles to take place on British soil.