After serving in Panama and Iraq, he retired from the Marine Corps with the rank of Gunnery Sergeant.
Special Agent Caitlin "Kate" Todd (Sasha Alexander) first appears in the episode "Yankee White".
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 is said to have played college basketball, "running the point for Ohio State" according to Abby.
It is mentioned in the season three episode "Kill Ari (Part I)" that he comes from a wealthy family but has been cut off by his father, Anthony Di Nozzo Sr (played by Robert Wagner who in turn was played by Weatherly in a TV movie).