'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 ...

“You had to create the setting of the warehouse ... there was an explosion, all this sort of chaos … That was quite a day. It’s like part disaster film, part NCIS.” He admits that seeing ...