the bay. as it hit each wave, it would splash up white water. and there's no simple explanation in loch ness for what that could have been. >> dinsdale's film also inspires marine biologist adrian shine to identify once and for all what lies beneath the surface of lake ness. >> it is an amalgam of many things put together by human perception, by human aspiration. we'd all love there to be something there. >> adrian's loch ness project has organized dozens of expeditions from operation deep scan, a 24-boat sonar exploration in 1987, to submarine searches, and even an exorcism. >> be gone now, hideous demon.