Nate Getz was a main character in season 1, but is a recurring character since the second season.
For all his appearances, see List of Appearances.
He observes surveillance tapes and watches/handles interrogations in order to make a Psychological Profile. He is also responsible for performing Periodic Psychological Evaluations of the Office of Special Projects Field Agents & Support Personnel and to provide ongoing monitoring of their Mental Health. He is afraid of disobeying orders from Hetty Lange and finds her scary. The OSP Team often fails to get his humor, for example, in the Episode: The Only Easy Day when he states: "What has the world come to when drug dealers aren't even safe within the comfort of their own fortified homes?". He states in the Episode: Callen, G., that he was abducted by Aliens as a child.
NCIS: Los Angeles Season 1
In the Episode: Chinatown, Nate expresses his Interest in becoming a Field Agent which is highly discouraged by the OSP Team because of his Inept Field Skills. He asks Hetty if she can think of any Operational Psychologist who has become a Field Agent; however, when she shares that the only known such person died on his second week of Field Work, Nate gets a little iffy about his choice.
NCIS: Los Angeles Season 2
Nate has received training in both Fieldcraft and Hand-to-Hand Combat, as demonstrated on several occasions in the episodes: Lockup & Harm's Way. Nate's departure as the main cast member coincides with Nate's reassignment to the Middle East to investigate an Islamic Extremist Group Based in Yemen. With the conclusion of that mission in the Episode: Harm's Way, Nate's current assignment is classified, although it is known that he is remaining in the Middle East for the time being.
NCIS: Los Angeles Season 3
NCIS: Los Angeles Season 4
Nate returned in the Episode: Paper Soldiers at Hetty's request.