Pretty Little Liars Spoiler: Will We Ever Find Out Who Is in the Creepy Old House?

In honor of next week’s Halloween episode (Season 3, Episode 13: “This Is a Dark Ride,” airing October 23), we’re taking a quick look back at the Halloween episode Pretty Little Liars fans will never forget. Alison (Sasha Pieterse) dressed as Lady Gaga … the creepy old house … yea, that one.
If you remember, the one thing that we never quite figured out about that episode was just who opened the door to Rosewood’s very own haunted house. The good/bad news: That might not be a mystery forever.
Read spoilers at your own risk! For more on Wetpaint Entertainment's philosophy on spoilers, click here.
When a fan asked PLL showrunner Marlene King on Twitter when we’re going to find out who opened the door to the creepy old house in Season 2, Episode 13: ”The First Secret”, she replied, “some day.”
Who do you think it will be? Someone we know? A new suspect for the “A” team? Could it have been Mona (Janel Parrish) even back then? And does this mean that the Liars will revisit that spooky old house?

We have to be honest: We’d be alright if we never saw that place again.