submarine searches, and even an exorcism. >> be gone now, hideous demon. >> but nessie has remained a no-show. >> i think the legend is popular because we seek dragons. and also, in a way, we like our mysteries to be something we can half comprehend as well. loch ness is one of the places where anybody can come. there's a road around it. it's not the antarctic. it's not outer space. it's not the bottom of the ocean. looking for monsters in a lake with a road around it is a mystery we can all join in with. >> when i finally see something in the loch, i really don't know what i'll do. i don't know what i would do. i wouldn't be packing up and going at the first opportunity. no. this is my life's passion is trying to solve this mystery. >> while skeptics have long dismissed the loch ness monster