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 starred Chris O'Donnell, Daniela Ruah, and LL Cool J alongside an ensemble cast. Cast members from the original NCIS made appearances on the series with Rocky Carroll recurring in the first three seasons and making an appearance in season six.
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.