History (episode)

History is the 15th episode of NCIS: Los Angeles Season 4 as well as the 87th episode of the entire NCIS: Los Angeles series.
==Synopsis==
OSP investigate the death of a former member of a domestic terrorist group, the Gun Barrel Party, a group that in the 1970s was wanted for carrying out a string of bombings as well as domestic terrorism with the investigation growing intense when it's discovered that a supposedly dead member of the Gun Barrel Party may in fact still be alive and living under an alias in downtown Los Angeles.
==Plot==
==Cast==
===Series Regulars===
Name 	Portrayed by 	Role
G. Callen 	Chris O'Donnell 	NCIS Special Agent and the leader of the Office of Special Projects field team.
Kensi Blye 	Daniela Ruah 	NCIS Special Agent with the Office of Special Projects.
Marty Deeks 	Eric Christian Olsen	A Detective with the Los Angeles Police Department and also the LAPD/NCIS liaison.
Eric Beale 	Barrett Foa 	Tech Operator with the Office of Special Projects.
Nell Jones 	Renée Felice Smith 	Tech Analyst for the Office of Special Projects.
Henrietta Lange	Linda Hunt 	Operations Manager with the Office of Special Projects.
Sam Hanna 	LL Cool J 	A former Navy SEAL-turned-NCIS Special Agent with the Office of Special Projects.
===Guest Cast===
Name 	Portrayed by 	Role
Oliver Johnson	Richard Cox (actor)	Member of the Gun Barrel Party who is using the alias "Roy Hale".
Jim Mullins 	Tim de Zarn 	Member of the Gun Barrel Party.
Leah Dewhurst 	Sylva Kelegian 	
David Thompson	Jared Hillman 	Professor Roy Hale's TA or Teaching Assistant.
Alan Sanderson	Hartley Sawyer 	Member of Red Tide.
Ellen 	Ciera Payton 	
Brad Ross 	Regan Burns 	
Jeff 	Landon Ashworth 	
  v - [ e] - dNCIS: Los Angeles Season 4
♦ Endgame (NCIS: Los Angeles episode) ♦ Recruit (episode) ♦ The Fifth Man (episode) ♦ Dead Body Politic (episode) ♦ Out of the Past (episode) ♦ Rude Awakenings (episode) ♦ Skin Deep (episode) ♦ Collateral (episode) ♦ The Gold Standard (episode) ♦ Free Ride (episode) ♦ Drive (episode) ♦ Paper Soldiers (episode) ♦ The Chosen One (episode) ♦ Kill House (episode) ♦ History (episode) ♦ Lokhay (episode) ♦ Wanted (episode) ♦ Red Part 1 (episode) ♦ Red Part 2 (episode) ♦ Purity (episode) ♦ Resurrection (episode) ♦ Raven and The Swans (episode) ♦ Parley (episode) ♦ Descent (episode)
Category:NCIS: Los Angeles Episodes
Category:NCIS: Los Angeles Season 4 Episodes
Category:NCIS: Los Angeles Episodes written by Scott Sullivan
Category:NCIS: Los Angeles Episodes directed by James Whitmore, Jr.