'Pretty Little Liars' (Season 4): What Do the Parents Really Know?

Since the very first episode of Pretty Little Liars back in June of 2010, the focus, of course, has been on the quartet of friends - Aria (series regular Lucy Hale), Spencer (series regular Troian Bellisario), Emily (series regular Shay Mitchell) and Hanna (series regular Ashley Benson) - who have been endlessly suffering at the