As the sixth season progressed, storylines shifted to Ziva's "sense of homelessness" and dual loyalty, climaxing at the end of the season as Tony fatally shoots her boyfriend Michael Rivkin and her apartment is bombed. Ziva, as a result, tells Gibbs that she cannot continue to work with Tony as she no longer trusts him, and Gibbs accepts this for the time being, saying that he will give her time to "remember who she can trust". Shortly after returning to Mossad full-time, she is sent on a mission to take down a terrorist in Somalia named Saleem Ulman. After one member of her team is killed and the other two injured, leaving her the only agent able to continue, she sends the remaining two back to Israel and opts to continue on to the terrorist camp alone. She is subsequently captured and held hostage for several months.