NCIS: Los Angeles is a TV series that aired on CBS from September 22, 2009 to May 21, 2023 for fourteen seasons. It is a spinoff of NCIS.

Cast & Character Origins

Characters	From	Date	Episode
G. Callen, Sam Hanna, Kensi Blye, Eric Beale, Nate Getz, Mike Renko	NCIS	April 28, 2009	S06E22: "Legend (Part 1)"
G. Callen, Sam Hanna, Kensi Blye, Eric Beale, Nate Getz, Mike Renko	NCIS	May 5, 2009	S06E23: "Legend (Part 2)"

Guest Characters

Characters	From	Date	Episode	Crossover Type
Leon Vance	NCIS	September 22, 2009	S01E01: “Identity”	A
Leon Vance	NCIS	October 13, 2009	S01E04: "Search and Destroy"	A
Leon Vance, Abby Sciuto	NCIS	October 20, 2009	S01E05: "Killshot"	A
Leon Vance	NCIS	November 10, 2009	S01E07: "Pushback"	A
Leon Vance	NCIS	November 17, 2009	S01E08: "Ambush"	A
Leon Vance, Abby Sciuto	NCIS	November 24, 2009	S01E09 "Random on Purpose"	A
Leon Vance	NCIS	May 11, 2010	S01E22: "Hunted"	A
Trent Kort	NCIS	May 25, 2010	S01E24: "Callen, G."	A
Leon Vance	NCIS	May 17, 2011	S02E24: "Familia"	A
Chin Ho Kelly, Danny Williams, Kono Kalakaua, Dr. Max Bergman, ——- Marku, Dracul Comescu, Venice Biker	Hawaii Five-0 (2010)	May 1, 2012	S03E21: “Touch of Death”	A
Leon Vance	NCIS	September 20, 2011	S03E01: "Lange, H."	A
Leon Vance	NCIS	October 13, 2014	S06E03: "Praesidium"	A
Anthony DiNozzo	NCIS	October 19, 2015	S07E05: "Blame It on Rio"	A
A.J. Chegwidden	JAG	February 19, 2017	S08E15: “Payback”	A
A.J. Chegwidden	JAG	April 23, 2017	S08E21: “Battle Scars”	A
A.J. Chegwidden	JAG	April 30, 2017	S08E22: “Golden Days”	A
A.J. Chegwidden	JAG	November 19, 2017	S09E08: “This Is What We Do”	A
A.J. Chegwidden	JAG	January 14, 2018	S09E13: “Các Tù Nhân”	A
A.J. Chegwidden	JAG	March 11, 2018	S09E14: “Goodbye, Vietnam”	A
Harmon Rabb Jr.	JAG	May 12, 2019	S10E23: “The Guardian”	A
Harmon Rabb Jr., Sarah MacKenzie	JAG	May 19, 2019	S10E24: “False Flag”	A
Harmon Rabb Jr., Sarah MacKenzie	JAG	Sep 29, 2019	S11E01: “Let Fate Decide”	A
Sarah MacKenzie	JAG	Apr 26, 2020	S11E22: “Code of Conduct”	A
Nick Torres, Alden Parker	NCIS	January 9, 2023	S14E10: "A Long Time Coming"	A
Jane Tennant, Lucy Tara	NCIS: Hawai’i	January 9, 2023	S14E10: "A Long Time Coming"	A

(Note: The Hawaii Five-0 characters Kono Kalakaua, Dr. Max Bergman, Marku, Dracul Comescu, and an unnamed Venice Biker appear in “Touch of Death” uncredited via archive footage in flashbacks.

The episode “Touch of Death” was the second half of a two part crossover story that began in the Hawaii Five-0 episode "Pa Make Loa" (which also translates to “Touch of Death”).

There was a three way crossover episode beginning with the NCIS episode “Too Many Cooks”, continuing in the NCIS Hawai’i episode “Deep Fake”, and concluding on the NCIS: Los Angeles episode “A Long Time Coming”.)

Outgoing Crossovers

Characters	Guest On	Date	Episode	Crossover Type
Lee Wuan Kai	NCIS	November 10, 2009	S07E07: "Endgame"	A
Kensi Blye	Hawaii Five-0 (2010)	October 24, 2011	S02E06: "Ka Hakaka Maika'i"	A
Sam Hanna, G. Callen, Jarrod Prodeman	Hawaii Five-0 (2010)	April 30, 2012	S02E21: “Pa Make Loa”	A
Hetty Lange	Scorpion	October 27, 2014	S01E06: "True Colors"	A
G. Callen, Sam Hanna	NCIS	January 9, 2023	S20E10: "Too Many Cooks"	A
G. Callen, Sam Hanna	NCIS: Hawai’i	January 9, 2023	S2E10: “Deep Fake”	A