We have seen alot of Zoe in the past 3 episodes as the "go to person" for Whitmore. Considering that this team is distincly different from his team of Mercenaries he sent before, it begs the question who are they. Specifically WHO IS ZOE? She is a Geophysicist. I beleive that she is Annie! Annie was Ben's childhood friend, seemed very interested in science when they were in school on the island with the Dharma Initiative. I beleive she is trying to ressurect the Dharma Initiative and has returned to the island. She seems to have her own agenda in addition to Whitmore agenda, her's is finding the ElectroMagnetic pockets.
So I think we will find out that she is Annie. What do you guys think?