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Descent is the final episode in the fourth season of NCIS: Los Angeles, and the ninety-sixth in the series as a whole excluding the back door pilot episodes and any crossovers.
Callen and Kensi head overseas and Sam and his wife go undercover when an explosion reignites the search for stolen nuclear weapons.
|Chris O'Donnell||G. Callen||Special Agent in Charge|
|LL Cool J||Sam Hanna||Senior Special Agent|
|Linda Hunt||Henrietta Lange||Operations Manager|
|Daniela Ruah||Kensi Blye||Junior Special Agent|
|Barrett Foa||Eric Beale||Tech Operator|
|Eric Christian Olsen||Marty Deeks||LAPD Liaison|
|Renée Felice Smith||Nell Jones||Intelligence Analyst, NCIS: OSP|
|Miguel Ferrer||Owen Granger||Assistant Director of NCIS|
|Aunjanue Ellis||Michelle Hanna/Quinn||Sam Hanna's wife|
|Timothy V. Murphy||Isaak Sidorov|
|Christopher Lambert||Marcel Jeanvier||Arms Dealer and Master Identity Thief|
|Alon Moni Aboutboul||Naseem Vaziri|
|NCIS: LA Season Four|
|● Endgame ● Recruit ● The Fifth Man ● Dead Body Politic ● Out of the Past ● Rude Awakenings ● Skin Deep ● Collateral ● The Gold Standard ● Free Ride ● Drive ● Paper Soldiers ● The Chosen One ● Kill House ● History ● Lohkay ● Wanted ● Red: Part One ● Red: Part Two ● Purity ● Resurrection ● Raven and The Swans ● Parley ● Descent.[ Season Three ] [ Season Five ]|