and that pretty much changed his life. changed my life. >> april 1960. loch ness, scotland. armed with a rented 16 millimeter camera, tim dinsdale is monster hunting. >> he read an article in 1959 in a small magazine and was fascinated by the subject. it covered things like a surgeon's photograph and other people's eyewitness testimony. >> the 1930s and '40s saw a surge in apparent loch ness monster sightings. including this one by malcolm irvine. dinsdale went to find it. >> he got a sequence of film. >> on his fourth day at the lake, tim captures what thousands before and since have tried and failed to film. >> he described it as for all well being like the back of an african buffalo. same color tone. quite a large object.