>> the one time i was really blown away by a sighting of something, i was at the other end of the loch at fort augustus and something just shot through the bay as if a torpedo went through the bay. and it was going against the wave, so 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