
Kensi Marie Blye is a fictional character in the show NCIS: Los Angeles. She is a Junior Field Agent in the NCIS Office of Special Projects Team stationed in Los Angeles. She first appeared in the NCIS season six episode "Legend ".

Grisha "G." Callen is a fictional character in the show NCIS: Los Angeles portrayed by Chris O'Donnell. He is an 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 ".

Ziva David is a fictional character from the CBS television series NCIS, portrayed by Chilean-born American actress Cote de Pablo. Ziva first appeared in the season 3 premiere episode, "Kill Ari ", and became a regular cast member from the episode "Silver War". She replaced Caitlin "Kate" Todd, who was killed at the hands of Ziva's half-brother, Ari Haswari, in the season 2 finale. Following the onscreen death of the character's father in season 10, Gabi Coccio recurrently portrayed a young Ziva in flashbacks.

Anthony D. "Tony" DiNozzo, Jr. is a fictional character from the CBS TV series NCIS portrayed by American actor Michael Weatherly. An original cast character created by producer Donald P. Bellisario, he is credited in 306 episodes, but actually appearing in 305 of the series. He has also made guest appearances on the spin-offs NCIS: Los Angeles and NCIS: New Orleans.

"Hiatus " and "Hiatus " are the 23rd and 24th episodes of the third season of the American police procedural drama NCIS, and the 69th and 70th episodes overall. They originally aired on CBS in the United States on May 9 and May 16, 2006. Both episodes are written by Donald Bellisario, the show's creator and executive producer at the time, and directed by Dennis Smith. They were seen live by 15.17 million and 16.49 million views respectively.

Leroy Jethro Gibbs is a fictional character of the CBS TV series NCIS, portrayed by Mark Harmon. He is a former U.S. Marine Corps Scout Sniper turned special agent who commands a team for the Naval Criminal Investigative Service. Gibbs is the most accomplished marksman on the team and the most skilled at handling violent standoffs; he depends on his other agents heavily for technical forensics and background checks. He is patient but firm with his team and has little patience for bureaucracy; he commands most other main characters—including his current staff Timothy McGee, Ellie Bishop, Nick Torres and Jacqueline Sloane and previous staff Caitlin Todd, Anthony DiNozzo, Ziva David, Alexandra Quinn and Clayton Reeves. Leroy Jethro Gibbs was born in 1954 as confirmed in the episode "Date with Destiny", in which he visits Shannon's grave and the date is shown on the headstone.

Sam Hanna is a fictional character in the show NCIS: Los Angeles. He is a former U.S. Navy SEAL and a Senior NCIS Special Agent. He first appeared in the NCIS season six episode "Legend ".

Timothy Farragut "Tim" McGee is a fictional character from the CBS television series NCIS. He is portrayed by Sean Murray. McGee specializes in cybersecurity and computer crime, and is a graduate of Johns Hopkins University and MIT.

Abigail "Abby" Sciuto is a fictional character from the NCIS television series on CBS Television, and is portrayed by Pauley Perrette. In a season 10 episode entitled "Hit and Run", a young Abby was played by Brighton Sharbino in flashbacks. Like Jethro Gibbs, Anthony DiNozzo, and Dr. Donald Mallard, Abby was introduced in the episodes "Ice Queen" and "Meltdown" of the television show JAG, and, up until May 2018, appeared in every episode of NCIS, in addition to being featured on the show's spin-offs, NCIS: Los Angeles and NCIS: New Orleans. The role has made Perrette one of the most popular actresses on U.S. primetime television in 2011, according to Q Score.

Caitlin "Kate" Todd is a fictional character featured in the CBS television drama NCIS portrayed by Sasha Alexander, appearing in 49 episodes of the series. Alexander made her series debut in the season one premiere "Yankee White", before departing the regular cast in the season two finale "Twilight". Alexander was credited as a guest star for her appearances in the season 3 episodes "Kill Ari " and "Kill Ari ," and appeared uncredited as a voice actor during season 8's "A Man Walks Into a Bar". Subsequently, Alexander has appeared in photographs, flashback, and CGI footage. Her most recent appearance was in "Family First".

Tony DiNozzo and Ziva David are fictional characters from the American police procedural drama NCIS. Tony, an original character, is portrayed by Michael Weatherly, and Ziva, who first appeared in the third season, is portrayed by Cote de Pablo. Frequently referred to by the portmanteau "Tiva", the characters' flirtation and the idea of them eventually beginning a relationship became a subject of interest among viewers, and by 2010, TV Guide reported that "many fans have become obsessed with the romantic tension". Focus and media coverage on the pair escalated over the years, particularly after NCIS became the most watched television series in America during its tenth season.