When does NCIS: Los Angeles return?

NCIS: Los Angeles is the first spin-off of the successful series NCIS and the second series in the NCIS franchise. The series originally starred Chris O'Donnell, Daniela Ruah, LL Cool J, Peter Cambor, Adam Jamal Craig, Linda Hunt and Barrett Foa. Other stars have included Eric Christian Olsen, Renée Felice Smith, Miguel Ferrer, Nia Long, Medalion Rahimi, Caleb Castille and Gerald McRaney.
NCIS: Los Angeles follows Special Agents Sam Hanna (LL Cool J) and Grisha Callen (Chris O'Donnell) as undercover agents. Sam is an ex-US Navy SEAL and former member of SEAL Team Six. Callen is a former foster child who became a "legend" under the watchful eye of Operations Manager Henrietta "Hetty" Lange.