loch ness, scotland. 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. it was several feet wide, several feet out of the water with a sort of reddish brown hide. and as he watched this thing, it suddenly took off. then he remembered why he was there. then he started filming. >> is this the elusive loch ness monster finally caught on camera? >> well, that's the perennial question, isn't it? that's the $64,000 question. he really didn't