Brian Dietzen (born November 14, 1977) is an American actor who has played the supporting role of Jimmy Palmer on NCIS since 2004.

Dietzen was born in Barrington, Illinois. Later, he studied theatre at the University of Colorado at Boulder's BFA acting program.

Dietzen has appeared in productions of Equus, and Waiting for Godot and joined The Colorado Shakespeare Festival for two years. He was cast in The WB series My Guide to Becoming a Rockstar. The part was a series regular as the drummer of the group. He later teamed up with John Riggi for a two-man show with Steve Rudnick called The Oldest Man in Show Biz.

He performed in the film From Justin to Kelly and has had a recurring role as Jimmy Palmer, a medical examiner's assistant, on the CBS series NCIS, since the first season episode, "Split Decision".

Pauley Perrette (born March 27, 1969) is an American actress, best known for playing Abby Sciuto^[p] on the U.S. TV series NCIS, a role that has made her the most popular actress on U.S. primetime television. She is also a published writer, a singer and civil rights advocate.

Perrette was born in New Orleans and raised all over the southern United States. She told Craig Ferguson, on The Late Late Show, that she lived in Georgia, Alabama, Tennessee, North Carolina, South Carolina, New York, New Jersey, and California. In a 2011 interview with the Associated Press, Perrette confessed her early ambitions were to work with animals, be in a rock and roll band or be an FBI agent. She attended Valdosta State University in Valdosta, Georgia, where she studied criminal justice, and later moved to New York City to study at the John Jay College of Criminal Justice. While in New York she held a variety of jobs: Not only was I bartending in club-kids scene, with a bra and combat boots and a white Mohawk, but I also wore a sandwich board on roller skates passing out fliers for Taco Bell in the Diamond District. Perrette also worked as a cook on a Manhattan dinner cruise boat.

María José de Pablo Fernández, better known as Coté de Pablo (born November 12, 1979), is a Chilean-American actress and recording artist. She is best known for her role as Ziva David in the CBS television series NCIS, for which she has won an ALMA Award. She has also embarked on a career as a songwriter and vocalist.

De Pablo was born in Santiago, Chile, to an upper-classCatholic family. She has a younger sister, Andrea, and a brother who works as a DJ. In the 5th grade, she found many people could not properly pronounce her first name of "Maria José" so she asked them to call her Coté (a common Chilean nickname for María José). When de Pablo was 10 years old, her mother, María Olga Fernández, received a job in Miami, Florida, at a Spanish-speaking television network. There, de Pablo attended Arvida Middle School and New World School of the Arts where she studied musical theater. She then attended Carnegie Mellon University in Pittsburgh, Pennsylvania, where she studied music and theater and appeared in several plays. These aforementioned plays include: And The World Goes 'Round, The House of Bernarda Alba, Indiscretions, The Fantasticks, and A Little Night Music. She graduated in 2000.

Mark Harmon (born September 2, 1951) is an American actor. Since the mid 1970s, he has appeared in a variety of television, film and stage roles following a brief career as a collegiate football player with the UCLA Bruins. Since 2003, Harmon has starred as Leroy Jethro Gibbs in the hit CBS series NCIS.

Harmon was born Thomas Mark Harmon in Burbank, California. His father was University of Michigan football All-American and Heisman Trophy winner, Tom Harmon. His mother was actress and artist, Elyse Knox (née Elsie Lillian Kornbrath). Harmon has two older sisters, actress and painter Kristin Nelson, the former wife of singer Ricky Nelson, and actress-model Kelly Harmon, who was once married to car magnate John DeLorean.

After attending Los Angeles Pierce College as a student and quarterback, Harmon transferred to the University of California, Los Angeles, and following in his father's athletic footsteps was the starting quarterback for the UCLA Bruins football team in 1972 and 1973. In UCLA's 1972 season he engineered a stunning upset of the two-time defending national champion, Nebraska Cornhuskers. He received the National Football Foundation Award for All-Round Excellence in 1973. In his two years as quarterback in coach Pepper Rodgers' wishbone offense, UCLA won 17 games and lost only 5. He graduated from UCLA with a B.A. in Communication cum laude in 1974.

Michael Manning Weatherly, Jr. (born July 8, 1968) is an American actor, best known for his roles as Special Agent Anthony DiNozzo on the television series NCIS, and Logan Cale on the television series Dark Angel.

Michael Weatherly was born in New York City on July 8, 1968, and raised in Fairfield, Connecticut, by parents Patricia O'Hara, a hospital administrator, and Michael Manning Weatherly, Sr. He graduated from Brooks School in North Andover, Massachusetts, in 1986. Subsequently, he spent some time at the American University of Paris but he left college to pursue acting. He also had a great passion for music, and played in a band while pursuing his acting career. Despite not continuing this, he contributed the song Bitter and Blue to the second soundtrack album of NCIS.

Weatherly began his professional acting career with a minor television role on The Cosby Show as Theo Huxtable's roommate.

He then obtained the role of Cooper Alden on Loving and later, The City, which he would portray from 1992 until 1996.