Woah... I was totally wrong. Did not expect it the least. All the while, I thought that Jin was the Subway Ghost after seeing the preview of the last two episodes (either ep 10 or 12). But I sympathized with him. Seeing his child died in front of him was totally unbearable. But then again, it is not right to take justice into his own hands, though I truly understand him. All he wants is to take revenge to all the people who did not help his daughter... I really love this episode. Can't wait for next Monday to come. Kudos to the writer. Amazing.