Michael Weatherly is directing his first episode of NCIS, which will introduce a recurring female agent named Erica Jane Barrett (to be played by Brothers & Sisters vet Sarah Jane Morris). In Erica's introductory episode on March 1, it's revealed that she accepted a job previously offered to DiNozzo by Director Shepard to lead an NCIS team in Europe.
Michael, who was involved with Sarah Jane's casting, describes the character as "a team leader who will be a very beautiful, strong, hard-charging, highly dramatic addition to the cast." He goes on to say, "She also represents a romantic threat to someone."
Since a show rep tells me this new character will share sparks with Tony, we can safely say Ziva (Cote de Pablo) had best watch out!
Source: TV Guide Magazine