Premiered 2009. The Naval Criminal Investigation Service's Office of Special Projects takes on the undercover work and the hard to crack cases in LA. Key agents are G. Callen and Sam Hanna, streets kids risen through the ranks.

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Season 4

24	Descent	14 May 2013
23	Parley	7 May 2013
22	Raven & The Swans	30 April 2013
21	Resurrection	23 April 2013
20	Purity	9 April 2013
19	Red, Part 2	26 March 2013
18	Red, Part 1	19 March 2013
17	Wanted	5 March 2013
16	Lohkay	26 February 2013
15	History	19 February 2013
14	Kill House	5 February 2013
13	The Chosen One	29 January 2013
12	Paper Soldiers	15 January 2013
11	Drive	8 January 2013
10	Free Ride	18 December 2012
9	The Gold Standard	11 December 2012
8	Collateral	27 November 2012
7	Skin Deep	20 November 2012
6	Rude Awakenings (Part 2)	13 November 2012
5	Out of the Past (Part 1)	30 October 2012
4	Dead Body Politic	23 October 2012
3	The Fifth Man	9 October 2012
2	Recruit	2 October 2012
1	Endgame	25 September 2012

Season 3

24	Sans Voir, Part II	15 May 2012
23	Sans Voir (Parts I and II)	15 May 2012
22	Neighborhood Watch	8 May 2012
21	Touch of Death (2)	1 May 2012
20	Patriot Acts	10 April 2012
19	Vengeance	27 March 2012
18	The Dragon and the Fairy	20 March 2012
16	Blye, K.	21 February 2012
15	Crimeleon	14 February 2012
14	Partners	7 February 2012
12	The Watchers	3 January 2012
11	Higher Power	13 December 2011
10	The Debt	22 November 2011
9	Betrayal	15 November 2011
8	Greed	8 November 2011
7	Honor	1 November 2011
6	Lone Wolf	25 October 2011
5	Sacrifice	18 October 2011
4	Deadline	11 October 2011
3	Backstopped	4 October 2011
2	Cyber Threat	27 September 2011
1	Lange, H.	20 September 2011

Season 2

24	Familia	17 May 2011
23	Imposters	10 May 2011
22	Plan B	3 May 2011
21	Rocket Man	12 April 2011
20	The Job	29 March 2011
19	Enemy Within	22 March 2011
18	Harm's Way	1 Mar 2011
17	Personal	22 Feb 2011
16	Empty Quiver	15 February 2011
15	Tin Soldiers	8 February 2011
14	Lockup	1 Feb 2011
13	Archangel	18 January 2011
12	Overwatch	11 January 2011
11	Disorder	14 December 2010
10	Deliverance	23 November 2010
9	Absolution	16 November 2010
8	Bounty	9 November 2010
7	Anonymous	26 October 2010
6	Standoff	19 October 2010
5	Little Angels	12 October 2010
4	Special Delivery	5 October 2010
3	Borderline	28 September 2010
2	Black Widow	21 September 2010
1	Human Traffic	21 September 2010

Season 1

24	Callen, G	25 May 2010
23	Burned	18 May 2010
22	Hunted	11 May 2010
21	Found	4 May 2010
20	Fame	27 April 2010
19	Hand-to-Hand	6 April 2010
18	Blood Brothers	16 March 2010
17	Full Throttle	9 March 2010
16	Chinatown	2 March 2010
15	The Bank Job	9 February 2010
14	LD50	2 February 2010
13	Missing	26 January 2010
12	Past Lives	12 January 2010
11	Breach	5 January 2010
10	Brimstone	15 December 2009
9	Random on Purpose	24 November 2009
8	Ambush	17 November 2009
7	Pushback	10 November 2009
6	Keepin' It Real	3 November 2009
5	Killshot	20 October 2009
4	Search and Destroy	14 October 2009
3	Predator	6 October 2009
2	The Only Easy Day	29 September 2009
1	Identity	22 September 2009