Last night's episode of NCIS ended with an assassination attempt on Ziva's father, whose whereabouts are now unknown. Follow the link for our full review of "Enemies Foreign."

Next week in "Enemies Domestic," we learn the identity of his assailant(s), as well as the significance of the Amsterdam case he and Vance were speaking so cryptically about.

Who could be a traitor? What do Eli and Vance know that's so damaging? Your theories and comments and welcomed. See what you think of CBS' first promo for Part II ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.