After serving in Panama and Iraq, he retired from the Marine Corps with the rank of Gunnery Sergeant.
He joined NIS, which later became NCIS, after his wife Shannon and only daughter Kelly were murdered in 1991.
Di Nozzo is known for his seemingly-endless film references; Ziva insists that his dying words will be "I've seen this film".
He attended Ohio State University as a physical education major and was a member of the "Alpha Chi Delta" fraternity, class of 1989.
Bellisario and Don Mc Gill as a backdoor pilot with the season eight episodes "Ice Queen" and "Meltdown" of JAG.
Gibbs is often shown in his basement building boats, one of which he names after his daughter and another after one of his ex-wives.NCIS is an American police procedural television series, revolving around a fictional team of special agents from the Naval Criminal Investigative Service, which investigates crimes involving the U. Senior Special Agent Leroy Jethro Gibbs (Mark Harmon) was born in Stillwater, Pennsylvania to Jackson and Ann Gibbs. The series premiered on September 23, 2003 featuring an ensemble cast which has included Mark Harmon, Sasha Alexander, Michael Weatherly, Pauley Perrette, David Mc Callum, Sean Murray, Cote de Pablo, Lauren Holly, Rocky Carroll, Brian Dietzen, Emily Wickersham, Wilmer Valderrama, Jennifer Esposito, Duane Henry, and Maria Bello.Di Nozzo's mother was over-protective and she "dressed him like a sailor until he was ten".("Frame Up") Di Nozzo is a flirt, and has a fondness for playing pranks on his co-workers, sometimes with little respect for their boundaries.Gibbs leads a Major Case Response Team (MCRT) consisting of field agents Anthony Di Nozzo, Timothy Mc Gee, and Ellie Bishop, supported by forensic scientist Abby Sciuto and medical examiner Dr. In the episode "Bête Noire", Gibbs comes face to face with terrorist Ari Haswari and tries to kill him but fails.Finding Ari later becomes an obsession for Gibbs after Ari shoots and kills original team member Kate Todd in front of Gibbs and Di Nozzo in the season two finale, "Twilight".In "Truth or Consequences", Gibbs saves his entire team by shooting the leader of a terrorist cell after Di Nozzo and Mc Gee get captured looking for Ziva.In the episode "Extreme Prejudice", Gibbs goes after Harper Dearing, cornering the terrorist in a home in West Virginia, and when the man is about to use his gun, Gibbs stabs him, killing him.He later travelled to Mexico and murdered the drug dealer responsible, a crime he kept concealed for twenty years.Since then, he has been married and divorced three times, and is single, although he has had a number of romantic relationships since his last divorce.