Pretty Little Liars' Janel Parrish: You'll See a New Side to Mona in the Finale

"Those b----es are finally going to get what they deserve."  Or will they?

In the Pretty Little Liars Season 3 finale, Mona (Janel Parrish) is determined to take down Aria (Lucy Hale), Spencer (Troian Bellisario), Hanna (Ashley Benson) and Emily (Shay Mitchell)  once and for all, and it appears she may have some help from the inside.