Mission Critical

S3, E8: The Shark Men divide and conquer to get the job done, but that approach causes some safety issues. While divers scout for hammerheads, Todd is off by himself and hooks a giant tiger shark. The divers' support boats rush over to assist Todd leaving the lead scientist alone in dangerous waters. The tense episode is the start of a growing divide between the anglers and scientists on priorities and protocol. But in the end, the mission takes precedent and they wind up having their best day ever in terms of tagged sharks. Costa Rica's Cocos Island is a designated protected area and the rangers are keeping a skeptical eye on the men. But their mission is urgent as thousands upon thousands of sharks are illegally finned in these waters.