"THE EYEBALL BELONGS TO SOMEONE YOU KNOW!"

So says Pauley Perrette (Abby) on Twitter. Wow. As if the ending of this week's NCIS wasn't (forgive us) eye-popping enough, that's quite the scoop from P-squared.

Perrette Tweeted that piece of knowledge as part of CBS' Tweet Week, and it certainly puts a disturbing, mysterious twist on the startling discovery Tony made.

In case you missed it, the episode concluded with the "P2P" sending a message to Ziva and Tony, who end their day at a bar, having failed to apprehend the serial killer.

After Tony surprisingly tells Ziva to ease up on Ray, the bartender delivers a drink from a patron who's since disappeared. Inside one of the ice cubes is an eyeball.

So whose eyeball is that, and on a related note, who's the P2P Killer?

Might he (or she) be someone we know as well? Discuss below!

FUN SIDE NOTE: Pauley also Tweeted that the baby doll used to lure the victim on Tuesday speaks with a computerized voice - one done by David McCallum (Ducky)!

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