There are a lot of police procedurals with acronym titles on TV today. It can be hard to keep them all straight. If you don't know, NCIS stands for Naval Criminal Investigative Service. In other words, it's like NYPD Blue but with more water. In a world where the Battleship board game is being made into a movie, it's nice to see a slightly more nuanced look at our navy and marines. After starting in 2003, the show has begotten one spin-off, NCIS: Los Angeles, starring, of all people, LL Cool J and Chris O'Donnell a.k.a. Robin from the bad Batman movies. Like seeing naval crimes get busted, check out our selection of NCIS shirts and hat seen in the hit show.