Pretty Little Liars Returns with a New "A"dversary Seattle Post-Intelligencer Copyright 2012 Seattle Post-Intelligencer. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Published 08:02 a.m., Monday, June 4, 2012 After dead-end clues, cryptic texts, tons of torment and even death, A was revealed to be Hanna's former best friend Mona (Parrish). When the ABC Family show returns on Tuesday (8/7c), the summer will have passed, Mona will still be locked up and the "A" messages will have gone radio silent - until, of course, an incident in the opening minutes of the premiere. (If you've seen this preview, it's pretty clear the something is a body.) The incident soon triggers a new adversary to communicate with the girl and from that moment on, Parish says viewers will be tasked with trying to solve the show's next major question. First Look: