List of NCIS: Los Angeles characters
Wikimedia list article
This is an overview of regular and recurring characters on the TV series NCIS: Los Angeles.
Overview
Main characters
Recurring characters
Main characters
G. Callen
Agent Grisha "G." Callen (born: Nikolaev) (portrayed by Chris O'Donnell) is the NCIS Special Agent in Charge, and the senior agent assigned to the Office of Special Projects. He first appeared in the NCIS season six episode "Legend (Part I)".
Before working at NCIS, Callen previously worked for the CIA (the longest), DEA, and FBI. Several episodes across the seasons reference his stint with the Agency. In seasons one and two, it is revealed that while with the CIA, Callen worked alongside recurring NCIS character Trent Kort (David Dayan Fisher), and was partnered with Tracy Rosetti (Marisol Nichols). Callen once served with his friend Leroy Jethro Gibbs, who now works at the NCIS Headquarters located in the Washington Navy Yard. Callen specializes in deep undercover work. Prior to the series commencing, G. Callen and Sam Hanna had been partnered for two years (as per the season three episode "Partner" where they celebrate their five-year partnership).
In the show's first episode "Identity", it is revealed that he is called "G" not because he dislikes his first name, but because he does not actually know what it stands for, as the system never told him. Further insights into his childhood come in season one's "Pushback", where Hetty Lange and operational psychologist Dr.
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