NCIS: Los Angeles returns Tuesday, September 25 after NCIS.

When Season 4 of the hit show commences, Callen is placed on suspension following his slaying of the Chameleon, while the newly-retired Hetty is nowhere to be found at the Office of Special Projects.

How long will Hetty and Callen stay on the shelf? We know these two aren't the type to go quietly, and from the looks of things in CBS' latest teaser, they are both very much in harm's way.

Check out a brief promo for the premiere, "Endgame," below ...

For more on the upcoming season opener of the action-packed drama, be sure to browse through our gallery of NCIS: LA Season 4 premiere photos, as well. The 25th can't get here fast enough.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.