People with "secret pasts" with Ali seem to pop up all over the place, and this year's Pretty Little Liars Halloween episode is no exception. Sasha Pieterse (Alison DiLaurentis) told Hollywood.com that we'll see a new suspect emerge during season 3 episode 13, "This is a Dark Ride".
“'Oh you’re definitely going to be seeing [Ali] in the Halloween episode. It’s kind of exciting because we see a new suspect.' This suspect that Pieterse is referring to is someone that had a secret past with Ali. Someone that we would have never thought was close with the girl we love to hate."...'It’s really exciting and kind of bizarre and very on the creepy side. It’s so funny how Ali dominates everyone she comes in contact to,' Pieterse reveals. 'You will see this kind of new dimension and you look at Ali in a totally different way and it’s so exciting. I can’t wait for the viewers to see it and see what they think. They might hate [Ali] a little bit, but they might hate this other person more.'”
Sasha also tells there's more than one character in danger during the episode, which doesn't exactly come as a big surprise seeing as how PLL writer, Andy Reaser said over Twitter that alternate endings (with alternate deaths) to the Halloween episode were filmed.
Who do you think "this other person" from Ali's past is going to be, and is it possible that Sasha is alluding to Ali's twin sister from the books?