River Monsters

Extreme fishing series. A vast and brooding lake that hides a dark history lies on the Canada-US border - it's an ancient and sacred site for Native Americans, but something has recently risen up from the depths to attack swimmers and stories abound of an invasion of primordial bloodsuckers. In a journey that takes him to the heart of a thundering waterfall in the Pacific Northwest, extreme angler Jeremy Wade embarks on a punishing mission to catch the most ancient river monster of his career.