<P> Michael Rivkin (Merik Tadros) first appears in the episode "Last Man Standing" as a Mossad officer . He is working with Ziva David when she is on an undercover mission for the Mossad in Morocco (Ziva having been dismissed from NCIS in the previous episode). Later on in the episode, he is seen in the office of the head of Mossad, Eli David, Ziva's father, as Ziva talks on the phone to Gibbs . Tony becomes suspicious of the man that Ziva appears to be dating, and keeps trying to find out who he is . For example, in the episode "Legend (Part 1)", Tony asks Abby to check the records on Rivkin . In the episode "Legend (Part 2)", Michael appears as an undercover Mossad agent who is investigating the same terrorists that NCIS is investigating, killing them off one by one before NCIS can apprehend them . He is asked to leave the U.S. by NCIS agent in charge in Los Angeles, Lara Macy and later by DiNozzo, both of them citing laws that prohibit foreign intelligence operatives from working in the United States . In the episode "Semper Fidelis", what appears to be an open and shut case of an Immigrations, Customs and Enforcement agent killed by a terrorist is complicated by the presence of Rivkin, who is still in the US visiting Ziva . Tony traces communication with the terrorist's computer to Ziva's apartment, where he finds Rivkin . After attempting to arrest an intoxicated Rivkin for the murders of the ICE agent and the terrorist handler NCIS was tracking, a struggle ensues and Tony shoots Rivkin in self - defense . Ziva later enters her apartment and attempts to help Rivkin but he succumbs to his injuries and dies in hospital . Finally, in the episode "Aliyah", the relationship between Rivkin and Ziva comes out and this leads Gibbs, Leon Vance, and Tony to Israel . There Eli David accuses Tony of killing Rivkin out of jealousy and Ziva, no longer able to trust Tony, stays in Israel . </P> <P> Dr. Samantha Ryan (Jamie Lee Curtis) is a psychologist, criminal profiler and Director of PsyOps . She is introduced in the episode "Psych Out" when a patient, a Navy warfare psychologist, of her colleague is found dead and Gibbs and his team are called in to investigate . She begins a romantic relationship with Gibbs and frequents his house, even causing him to be uncharacteristically late for work once . Like Gibbs, she has a young child, a son, and is either divorced or separated from her partner / husband . While Gibbs and Ryan try to keep their relationship strictly professional when at the office, Gibbs' agents and Ryan's co-workers frequently speculate on their relationship, as seen in "The Tell". Her last appearance is in "Till Death Do Us Part" when she is threatened by terrorist Harper Dearing, who is seeking revenge on everything and anyone connected with the Navy for the death of his son . </P> <P> Leyla Shakarji (Tehmina Sunny) is the daughter - in - law of Mike Franks . She was disowned by her family and then smuggled out of Iraq after becoming pregnant with the child of Franks's biological son, Lance Corporal Liam O'Neill, USMC . O'Neill was murdered and Gibbs finds out about Leyla from Franks as he was the lead agent assigned to the case . She and her daughter, Amira, lived with Mike in Mexico until his death in 2011 . Gibbs, as Amira's godfather, asks Leyla to move to Washington DC to be nearer to him as he is their closest thing to family . Leyla's mother, Shada Shakarji (Diane Venora), is the tough - as - nails matriarch of one of the most prominent tribes in Iraq, due to the fact that most of her male relatives are now deceased . </P> <P> Chip Sterling (Michael Bellisario) first appears in the episode "The Voyeur's Web", as a new lab assistant working alongside Abby Sciuto, whom new NCIS Director Jenny Shepard has hired for her much to the displeasure of Abby, who continues to insist she prefers to work alone . As with most newbies, Chip ends up being the butt of Tony's jokes and is told off by Gibbs for lack of concentration on several occasions . Chip, having sinister motives, after being fired from his last job, attempts to frame Tony for murder (in which he almost succeeds) in the episode "Frame Up". In a last - ditch effort, he also attempts to attack Abby with a knife after being discovered, but she quickly subdues and hog - ties him with duct tape before asking Gibbs if she can now work alone . </P>

Who played mike franks daughter in law on ncis