Oh you guys - this is going on too long - my heart can't handle all this talk about Jethro!!!
Here's my take on the season finale - Ray Cruz is the P2P killer. Ziva was an intended victim, but he fell for her instead. He's going to be back with a vengence since she broke up with him. The blue eye in Tony's drink belongs to the woman from the earlier episode when the lights went out - she's programed for all doors. What do you think??