It's Caleb, but what is he not happy about? Well, let's be honest, no one in this image looks happy. It looks as if the liars know something incriminating about him, but as always, we'll have to tune in to see what is really going on. Looks can be deceiving in Rosewood.
Given that the official episode description says that Kenneth Dilaurentis gives the liars clues they need in order to find out the truth once and for all,it only seems natural that the liars would be a little under pressure to get to the Radley documents before they are destroyed.
These girls clearly don't like what Toby and his new sidekick, Lorenzo have got to say. Given that the episode finds the liars searching on their own for answers, it's pretty much a sure thing that no one believes them.
Considering how little time has passed since we were first introduced to the liars, we'd say that Anne could win the award for changing the most. She looks AMAZING. Will she provide clues to the answers we so desperately require?
You think the truth is this big shiny disco ball of purity then go ahead and try it. See what it gets you. Telling the truth to the wrong person at the wrong time is how I ended up where I did. Take it from me you're always better off with a really good lie.