Filming for season 6 of NCIS: Los Angeles is well underway and soon the Special Operations team will pick up a new case in "The 3rd Choir."

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Penned by newbie LA writer Dana Scanlon and longtime vet R. Scott Gemmill ("Deep Trouble," "War Cries"), "The 3rd Choir" will be directed by Diana Valentine.

"Prep is underway w/ [Valentine]," tweeted executive producer John Peter Kousakis on Tuesday. "It's another fine script by Gemmill and Scanlon. #StayTuned."

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Although "3rd Choir" will be the third episode to film during season 6 production, it has yet to recieve an air date.

As the CBS drama prepares to bring Callen (Chris O'Donnell), Sam Hanna (LL Cool J), Kensi (Daniela Ruah), Deeks (Eric Christian Olsen) into their sixth year as a team, NCIS: LA has several adventures to get through before fans will get to see "The 3rd Choir" on screen.

When the new season kicks off, Callen's team will still be in danger from last spring's "Deep Trouble." As G and Sam struggle to find a way out of a bomb-laden (and soon to be sinking) submarine, Kensi and Deeks will spend "Deep Trouble: Part 2" trying to track them down before time - and air - runs out.

Find out more when NCIS: LA returns to CBS on Sept. 29 at 10 p.m. ET. Click the video below to see a preview of the series' latest episode.

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NCIS: LA, NCIS: Los Angeles, Television, CBS