The is the official T.V. soundtrack for the T.V. show "NCIS" (which stands for "Naval Criminal Investigative Service). It includes several tracks, including the NCIS theme song, as well as songs by a few of the cast members, and other NCIS-related music.
NCIS music is here also (unofficial) . http://www.ncisfanwiki.com/page/Music+of+NCIS