Tony DiNozzo and Ziva David

Tony DiNozzo and Ziva David are fictional characters from the American police procedural drama NCIS. Tony is portrayed by Michael Weatherly, and Ziva, who first appeared in the third season, is portrayed by Cote de Pablo. Frequently referred to by the portmanteau "Tiva" (for Tony and Ziva), the characters' flirtation and the idea of them eventually beginning a relationship became a subject of interest among viewers, and by 2010, TV Guide reported that "many fans have become obsessed with the romantic tension". Focus and media coverage on the pair escalated over the years, particularly after NCIS became the most watched television series in America during its tenth season.

The characters were initially scripted as having a "cat and mouse" relationship, something that continues into the later seasons. The pairing develops at a slow pace throughout the series and is dealt a number of obstacles. This includes Tony's "commitment phobias", Ziva's trust issues, a series of other love interests, and Ziva being taken captive and presumed dead between seasons 6 and 7 after a serious breakdown in their relationship.

In the season 13 finale, Ziva is seemingly killed by a mortar attack arranged by former CIA Agent Trent Kort, and Tony learns that he and Ziva have a daughter, whom she named after her sister, Tali. These events drive Tony to leave NCIS to look for answers and to care for their daughter.

In the season 16 episode "She", it is revealed that Ziva is alive and had gone into hiding. It is also implied that Ziva may still be working as an investigator in some capacity. A note left for Eleanor Bishop asks that Bishop keep the secret for "the safety of my (Ziva's) family". Ziva then reappears in the season 16 finale, "Daughters", to warn Gibbs he is in danger after he takes down drug dealers. Ziva reveals that she faked her death and went into hiding to protect Tony and Tali, after learning that a powerful woman named Sahar with ties to her brother Ari wanted her dead. After eliminating Sahar and her associates, Ziva returns home to Paris to reunite with Tony and Tali in the season 17 episode "In the Wind".