He studied McGee is also a writer, writing mystery crime novels including a national bestseller, With DiNozzo's departure in the final episode of season thirteen, McGee is permanently promoted to Senior Field Agent. E.J. Ducky hires her as his assistant to help keep him on schedule on a book he is writing about past cases.

Prior to his departure in the season thirteen episode "Family First", Michael Weatherly appeared in every episode except season thirteen's "Homefront".
In "Whiskey Tango Foxtrot", Eshel lends his expertise in order to give DiNozzo an insight into Ziva's personal life and current whereabouts. In the episode "Gibbs has developed a fatherly relationship with most of his team members, especially Abby Sciuto. However, after working with them to bring down his sister's attackers, he is offered a spot on the team with Alex Quinn. Her most recent appearance was in the season twelve episode, "The character is also a recurring special guest on the spin-off Over eight years after his first appearance, Burley returns in the season nine episode "She develops a romantic relationship with DiNozzo and the two seemingly stay in contact, but she breaks it off at the end of "After becoming a team leader and being assigned to Gibbs later interrogates her and her fiancé, who is revealed to be the man she cheated on Gibbs with; and later when it is revealed that her cell phone has been bugged, Gibbs discovers that Sergei Mishnev has been stalking her and has her and her fiancé put into the witness protection programme. and Tony are targeted by an unknown killer. He then sends Hart to Washington in a bid to have his revenge against Gibbs.

Faith became aware of this after asking Jack for the medical history of both of her parents and despite Sloane's attempts to hide the real reason behind her daughter's birth, Faith is grateful for it as she gave her a great life and reconciled her relationship with her mother. Dunne tells Carrie that he has an alibi, in that he was involved in a murder outside of the base at the time of the hit and run, and that somebody else must have stolen his truck. While friendly and charming to everyone he meets, he strikes up a rivalry with Torres; both are seasoned undercover agents and generally try to one up each other. To play the young Vance, Rocky Carroll underwent make-up procedures that he described as "a little instant facelift".Vance is trained by Sharp and after a six-week training course, leaves for an operation in Amsterdam, codenamed Trident. Gibbs and Franks decide to cover Jenny's mistake and death by burning down her More of Vance's background is revealed in "Enemies Domestic", in season eight. During Eshel's first appearance, he assists in the investigation into Ilan Bodnar, working with Tony and Ziva; in the same episode, it is mentioned that he and Ziva spent the night together after her father's funeral. Despite Gibbs and Ziva's efforts, they arrive too late to save Eshel who ultimately succumbs to his injuries and dies although Eshel tells them that the real Sahar they've been looking for is someone they know before dying, leading the two to realize that the real Sahar is Gibbs's neighbor, Sarah. In "Described by her boss at the NSA as a "reclusive data freak", Bishop claims that she "remembers almost everything she reads", and often thinks while sitting cross-legged on the floor. In season 17 episode "Blarney" reveals Sloane became pregnant after she was sexually assaulted by a friend in college and gave up Faith to protect her from her father. In the episode “Death from Above”, it is revealed that Torres has feelings for Bishop.

Nick is also not afraid to break rules if he needs to, which on occasion has him butting heads with Gibbs.