Im fairly certain my IQ dropped significantly after watching this show.. It highlights the use of expensive technologies that are wasted on finding monsters that clearly don't exist.
The episode I watched consisted of them looking for an underwater monster creature. During the daytime they dive and can't find anything. That night, they go to a different location, dive in the complete darkness where the camera's see virtually nothing, and yell things like "OH MY GOSH, I GIANT FISH JUST PASSED BY ME!!" This would be be kind of cool if the camera caught any of the "giant fish," but clearly not. You would think after such a breakthrough they would check out the same area during the day time when you can see.....anything. But the show ends there, as a 'mystery'
If you want to watch a bunch of grown men scream like girls while throwing expensive night vision cameras at nothing, then this show is for you. But if you value any actual investigations that use things like the scientific method and common sense, I highly recommend anything on the Discovery Channel.