There is still tension, however, stemming both from NCIS director Jenny Shepard's decision to add Ziva to the team without consulting him and Ziva's habit of occasionally calling on Shepard, with whom she had a close relationship, to obtain key information in a case without going through regular channels (as seen in the Season 3 episode "Head Case"). However, this tension is lessened in the conclusion of the episode "Silver War" after Ziva saved Ducky's life. Ducky later tells Gibbs, "You took to Ziva more quickly than to any other agent before her. Timothy, Caitlin, even DiNozzo. I've always sensed there's a strong bond between the two of you. Something shared perhaps."