I have a theory..

for the season 2 final, as あなた know we have many midseason finals etc. and with each one one of the girls was endanger または killed,
Season 1x10 - Hanna hit によって car
Season 1x22 - Spencer nearly pushed to her death
Season 2x12 - Emily nearly killed によって the fumes
Season 2 final i think Aria could be endanger
Well thats what i think anyway, it would be cool if i was right, i never can predict the season finals