“Party Crashers” – After Hetty turns in retirement papers and then disappears, Executive Assistant Director Shay Mosley (Nia Long) arrives in Los Angeles to oversee the team and immediately makes staffing changes. Also, still mourning the death of his wife and living in a trailer on the beach, Sam is adamant that Callen find a new partner, on the ninth season premiere of NCIS: LOS ANGELES, Sunday, Oct. 1 (9:30-10:30 PM, ET/PT) on the CBS Television Network.

CHEAT TWEET: Hetty has disappeared, Sam is still out & a new boss (@nialong) arrives – Season 9 premiere #NCISLA 10/1 9:30pm