1. Ziva Wasn’t Originally Planned to Stay Long
Ziva David was first conceived as a short-term character. The show’s writers brought her in for a limited arc — essentially a few episodes — without knowing if she would catch on with fans. At that stage, it wasn’t even certain the role would be recurring. This meant casting was more tentative, and many actresses were considered before the creative team settled on de Pablo.2. Cote de Pablo Was Relatively Unknown
At the time, Cote de Pablo wasn’t a household name. She had done some TV and theater work, but she wasn’t an obvious superstar pick. Producers actually auditioned many actresses for Ziva, looking for someone who could bring depth, charisma, and chemistry with the existing cast, especially with Michael Weatherly (DiNozzo). Multiple sources say de Pablo wasn’t the first choice on paper — only after several rounds of auditions and screen tests did she rise to the top.3. Chemistry Tests Sealed the Deal
The decisive moment came during chemistry reads. Once Cote de Pablo read opposite part of the NCIS cast, the producers knew they had something special. Her blend of toughness, vulnerability, and dry humor clicked with fans in a way the writers hadn’t expected. That’s why Ziva went from a short-term storyline to a core character for many seasons.4. Fan Reaction Locked In Her Future
Once Ziva started appearing, audience response was immediate and strong. Viewers connected with her backstory, her emotional layers, and her relationships with the team — particularly with Tony DiNozzo. This fan enthusiasm helped shift the character from a limited arc to a long-term presence on the show.5. Cote de Pablo’s Work Elevated the Role
In interviews later on, de Pablo credited the writing and her own desire to explore the character deeply for Ziva’s success. She brought nuance to the role that made Ziva more than just a replacement for another character. 
