When you watch NCIS Season 14 Episode 24, a couple of British chemists in Paraguay are checking for water contamination in a river when they make a horrifying and much more immediate discovery: a severed hand and other body parts. The hand is soon identified as belonging to Petty Officer Matthew Dean, a SEAL, who entered Paraguay on a tourist's visa despite orders for military personnel to stay out of the country. At first, the NCIS team believes that Dean, known for his exotic travels and wild adventures, went on a solo water adventure after returning home from a mission. When they talk to Dean's wife, however, she tells them that she thought he was on a fishing trip in Canada. The situation only grows more ominous when they discover that one of Dean's friends, a fellow SEAL, is missing -- as is a large amount of weaponry from his motorhome. Were Dean and his friend Hudson both down in Paraguay? Is Hudson still alive? And why were they down there, anyway, and what was with the ordinance? They team searches desperately for clues as time is running out. Find out what happens when you watch the season finale, NCIS Season 14 Episode 24, online.