NCIS Season 12: Family Ties
Carolyn Gibbs has not spoken to her father in four years. For good reason; she's been deep-cover, working among terrorist groups in Germany, Russia and Israel. Director Vance gave her a very specific mission, to take down the terrorist Sergei Mishnev.
So she gets close to Sergei, lets him trust her, gathers information on him. And she thought that nothing would make her drop that mission. Until Sergei tells her that they have a new target: Leroy Jethro Gibbs.
Carolyn does the only thing she knows how to. Deceive Sergei, stay close to him. And when he shoots down her father's helicopter, she breaks cover, finally working against Sergei and helping her father and his agents escape.
But with Sergei still alive, her job is not over. And because of her choices, they don't have information on his movements anymore. Carolyn may have just made this a lot harder for herself.