Who is the new lawyer on NCIS?

It depends on which season you are talking about; in season 1 and 2 it it is just Gibbs, DiNozzo, Kate, Ducky, Abby and Tom Morrow as director in season 2 we bring in McGee, in season 3 Kate and Tom go and Ziva replaces Kate and Jenny Shepard replaces Tom in in season 6 Leon Vance replaces Jenny Shepard as director . Then Ziva leaves and Ellie comes