Someone's Dying in the Pretty Little Liars Finale, but Who?!

Since we assume none of the main liars will die, we can't help but look to the ones they love most. Caleb is the most likely candidate for one major reason: he's been the most involved in the "A.D." witch hunt. Caleb has been helping the girls hack into all things "A.D." and sabotaging evidence that might incriminate them. If "A.D." has any final devastating move, it would be to take Caleb out.