Talk:How the 'A' Stole Christmas/@comment-25547603-20141024172821

Since PLL writers love foreshadowing, no one will take away from me the idea we have a big foreshadow in 3x16. Here's my theory: Aria is drugged in 3x16 and we mistake the blonde in her room for Meredith when it's Alison instead. I think in 2009 Aria had already developed mental issues like anger and depression, she was also drugged that night, and seeing a blonde talking to Byron followed that blonde thinking she was Meredith.

She followed her (it was Alison!), but she lost her and then suddenly ran into Bethany. She knocked her in a furious rage. Then later that night Alison went missing and she thought she was guilty of knocking her friend and had a nervous breakdown. Her parents told everyone they were leaving for Iceland but secretly committed her into Radley (that's why Eddie Lamb remembers her) and weeks later she completely healed, forgetting everything (it happens after a traumatic event).

Then they moved to Iceland - as they had already told everyone - to begin a new life. Aria doesn't remember anything, but that's why all the clues about madness connected to Aria (the mirrors, etc etc). I think she will remember at some point, probably during the final episodes of season 5, and another piece of the puzzle will become clear.