Watch TV Show Season NCIS: Los Angeles - Season 12 in . Released in Year of 2020. Original title of the TV Show Season is NCIS: Los Angeles - Season 12. TV Show Season can be best described by Action,Crime,Drama Genres. Now the Plot of the Series is that The Naval Criminal Investigation Service's Office of Special Projects takes on the undercover work and the hard to crack cases in LA. Key agents are G. Callen and Sam Hanna, streets kids risen through the ranks..