Professional shark tagger Keith Poe, and marine biologists Greg Stuntz, Matt Ajemain and their team use state-of-the-art technology to try to document a live-predation of a thousand-pound mako shark -- what fishermen call a "grander." Granders are enormous makos that make a kind of transformation when they reach 10 feet and 1000 pounds - they become more secretive and begin to hunt bigger prey, like seals. And they're hard to find on the East Coast - until Joe Romeiro and team jump in the water after dark and come face to face with them.