Martin "Marty" Deeks is an undercover Los Angeles Police Department Detective who is also the liaison between the Naval Criminal Investigative Service's Office of Special Projects Office and the LAPD who made his debut appearance in the NCIS: Los Angeles Season 1 episode, Episode: Hand-to-Hand.
As the NCIS/LAPD Liaison Officer, Deeks is responsible for facilitating communications between both agencies, and coordinating joint operations involving LAPD components.
- Deeks's weapon of choice is a Smith & Wesson 5944. This is because he is simply attached to NCIS as a liaison officer, not an NCIS Special Agent.
- Like Ziva David, Deeks is currently a liaison officer to NCIS although it is not yet known if it is not yet known if Deeks will stay in that position permanently or like Ziva, if he will resign altogether and choose to become an NCIS Agent instead.
- Also like Ziva who replaced the deceased Caitlin Todd, Deeks also replaced Dominic Vail who like Kate died in the line of duty.