NCIS: Los Angeles is back in action.

Callen (Chris O'Donnell), Kensi (Daniela Ruah), Sam (LL Cool J), and Deeks (Eric Christian Olsen) have plenty of terrorists to stop, and the cast embarked on their season 7 adventure on Friday.

As cameras begin to roll for the fall season, new tidbits have begun to leak out regarding episode 701 (airing order unconfirmed). Penned by Scott Gemmill ("Traitor," "The 3 rd Choir") and directed by John Peter Kousakis ("Chernoff, K.," "Inelegant Hart"), the upcoming installment will feature the return of a certain CIA spook.

"First day of S7 tomorrow, and I'm gonna get my hands on Erik Palladino," Miguel Ferrer tweeted on Thursday. "Hang on boys and girls, because here we go."

Palladino is well known for his roll as Sabatino, a character who has not been seen since season 5's "Spoils of War" (see video below). What case could call on the CIA agent?

Whatever new threat the Office of Special Projects will face, they will do so at the beach. Check out the photos below to get a behind-the-scenes glimpse at the first day back on set.

NCIS: LA will return to CBS on Sept. 21 at 10 p.m. ET.