'NCIS: LA' preview: Eric Christian Olsen and boss tease big 'reveal' in two-part episode 'NCIS: LA' boss on the season finale and the explosion that could spell disaster for the team -- EXCLUSIVE ...

on the teams based out of Los Angeles, New Orleans, Hawai'i and Sydney. In this week's episode of CBS' NCIS, titled "Bad Blood," Special Agent Timothy (Farragut) McGee (played by Sean Murray) put on ...