Ncis Los Angeles - Season 3 -

: The season begins with the team in Romania to rescue Hetty from the Comescu crime family. This mission reveals a "bombshell secret" regarding G. Callen's lineage—his grandfather was an OSS agent whose actions sparked a decades-long vendetta with the Comescus.

In "Neighborhood Watch," Kensi and Deeks go undercover as a married couple to find a Russian sleeper cell—a fan-favorite episode for the "Densi" dynamic.

NCIS: Los Angeles Season 3, which originally aired from 2011 to 2012, is often cited by fans as one of the series' strongest entries. This season significantly deepens the backstories of its lead characters while introducing high-stakes multi-episode arcs and the show's first major crossover event. NCIS Los Angeles - Season 3

Critics at Crimespree Magazine highlighted this season for successfully filling in character backstories and balancing procedural elements with long-form storytelling. The addition of Miguel Ferrer was praised for adding a new layer of tension within the Office of Special Projects (OSP).

A two-part event with Hawaii Five-0 ("Pa Make Loa" and "Touch of Death") where the teams unite to stop a biological attack. : The season begins with the team in

: A major two-part event, "Blye, K.," explores the mysterious death of Kensi's father. Kensi becomes a murder suspect herself as she pursues her father's killer, leading to an emotional confrontation with her past.

"Sans Voir" (Parts 1 and 2) sees Callen take extreme actions against The Chameleon, leading to his arrest and Hetty's shock resignation. In "Neighborhood Watch," Kensi and Deeks go undercover

Season 3 features the core team working under intense pressure from both external enemies and internal shifts.