The first sign that Aria was in danger was when she sat alone in one of the train cars, and someone wearing the joker costume lifted off their ring to drop some kind of sedative into her drink. The next thing we knew, Aria woke up inside a claustrophobic box just big enough to hold her and … Garrett’s (Yani Gellman) dead body.
As she started to come to, she became aware that the box was moving. In fact, it was being pushed by at least two people around the moving train. We could hear a female voice, telling the other(s) to “Just push!” And then there was a male voice, saying, “I’m trying!” When Aria finally got her hands free, she used a screwdriver to stab the guy in the hand.
Soon it became obvious that whoever had drugged her and trapped her inside the box intended to shove the box right off the speeding train. The rest of the Liars got there just in time to save her, but they still had no idea who’d tried to murder Aria.
We think it’s a safe theory that Mona (Janel Parrish) was the girl moving the box around. We already know she’s murderous, and we know that she was on the train, thanks to the final few scenes, where her mask lies next to her Radley bed. But what about the guy?
What if it was Byron Montgomery (Chad Lowe)? After all, we discovered that Byron was with Alison (Sasha Pieterse) the night she died. They seemed to know each other on a personal level, and were talking suspiciously about his mistakes, and what she was capable of doing. Could Byron be on the “A” team? Even if he is, are we really so sure that he would be willing to murder his own daughter?
Somehow we doubt that last part. So you tell us: Who tried to kill Aria?