<P> One aspect Bellisario wanted to change was the way the character would interact with Tony . Though Tony and Kate had a "wonderful dynamic", he ultimately thought that "(she) treated (him) like a big brother" and decided "to bring in a character that causes Tony to have to sit back and not quite be able to handle her". </P> <P> Cote de Pablo, who was one of the last to audition, was set to perform opposite Michael Weatherly to test for chemistry . Weatherly improvised during the audition by brushing her hair back and commenting, "You remind me of Salma Hayek ." De Pablo, who was initially upset by the departure from the script, stayed in character and "dismissed him completely". She later said in an interview, "He totally did it with the other (actresses). One other girl sort of flirted back with him, and she was sort of open . Which is what actors do! They're sort of open . But I got lucky and got the part because I responded the way they felt was right ." </P> <P> According to Bellisario, CBS chief executive Leslie Moonves "took one look at her and said, Wow!" Co-executive producer Charles Floyd Johnson commented, "When you get actors who really listen and respond organically in the moment to what they're hearing, sometimes magic happens . They really seemed to get that immediately, and that doesn't always happen ." </P> <P> Producers eventually decided to make de Pablo's character, who was given "the arresting name of Ziva David", an Israeli agent . Bellisario had previously discussed possibly scripting her as European or Australian . She is introduced as having a soldier mentality and as "(someone) who was comfortable in her own sexuality and used to working with men on an equal footing". </P>

What season do ziva and tony get together