When a Marine reservist is brutally murdered in an fish aquarium, OSP investigate and are stunned to discover that the death is connected to a case their colleague, NCIS Special Agent Mike Renko has been working with the case leading Callen, Sam, Kensi, Renko and the rest of the OSP team to a dangerous militia group, Enhancing Law Enforcement or ELE. As the team scramble to arrest the members of the group and retrieve six stolen anti-tank missiles while preventing ELE from launching their next attack against illegal immigrants, the whole situation soon escalates into a highly tense stand-off with a lot at stake and has Callen caught in the middle while Hetty is in Washington, D.C., attending a Senate hearing.
Plot
Major Events
Mike Renko returns to OSP.
Episode Name Origin
The name "Ambush" refers to the supposed ambush of the militia group during the episode.
Trivia
Enhancing Law Enforcement would later be mentioned in the Season 3 episode, Touch of Death (episode).
During the episode, Hetty remarks to Director Leon Vance that the last she'd heard was that Macy was working out of a Quonset hut in Djibouti, although this was later contradicted in the NCIS Season 7 episode, "Patriot Down" where it was revealed that prior to her murder, Macy had been working with a task force in Marseille, France.