Ep 12. The Enemy Within

Tony and Bishop are called to the USS Reuben James, the Navy's oldest active-duty destroyer, to investigate the death of a sailor. Their investigation quickly leads them to suspect that a mole is on board the ship, leaking information to a foreign government. Meanwhile, back at NCIS Headquarters, McGee and Abby work together to uncover the identity of the person behind a series of cyber attacks on Navy computer systems. The two cases are connected, and the team must work quickly to catch the enemy within before more damage is done. Along the way, personal relationships are tested and trust is questioned as the team races against time to stop the threat.