<P> The ninth season of NCIS : Los Angeles premiered on October 1 , 2017 on CBS for the 2017 -- 18 television season . The season is due to contain 24 episodes . The season contained the show 's 200th episode . The season is set to conclude on May 20 , 2018 . </P>
when do new episodes of ncis los angeles return
October 1 , 2017