"first of all sorry for my english, i have problems with the writting.
i think that Zivas father hired those pairates to find out what Ziva knows about NCIS. then Gibbs and Tony save Ziva and she understands who she can really trust, then something happends to Vence and Gibbs discovers that he is a mole and the paper he destroyed in the final of season 5 was about an on going investigation to find a mole, and janny started that investigation becouse she didn´t trust him. and of course tiva thing going on during the hole season."