The NCIS: Los Angeles cast is still enjoying their summer vacation, but Chris O'Donnell and crew will return to work by the second week of August.

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The CBS drama filmed their season 6 premiere last spring and the Special Operations team will move on to a new adventure on Aug. 4 following their finale/premiere submarine two-parter.

In addition to the previously filmed premiere and one episode directed by O'Donnell (Callen), NCIS: LA will film three more episodes during August. First up will be a storyline directed by executive producer Peter Kousakis, second will be an episode from veteran NCIS and NCIS: LA director Dennis Smith, and third will be an installment directed by Diana Valentine.

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When NCIS: LA picks up after the summer hiatus, Callen and Sam (LL Cool J) will still be fighting for their lives on a bomb-laden submarine during "Deep Trouble: Part 2." As those two battle beneath the waves, Deeks (Eric Christian Olsen) and Kensi (Daniela Ruah) will take to the air to track down their missing teammates.

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 for the series' latest episode.

Tags: NCIS: LA NCIS: Los Angeles television CBS