NCIS and its popular spin-off NCIS: Los Angeles are returning back-to-back with all-new episodes staring Tuesday, September 25th. We have the NCIS Season 10 trailer, which kicks off with Extreme Prejudice at 8/7 c, and the NCIS: Los Angeles Season 4 trailer, which kicks off with Endgame at 9/8 c. Watch as your favorites, including Mark Harmon, Pauley Perrette, Chris O'Donnell, and LL Cool J, return for another year of crime solving drama.