Maria tells Ben that what is behind the door could hold the key to getting her memory back. Ben says that she has to risk everything that she is in order to be everything that she wants to be. He offers to go through the door with her. Their cave is behind the door, and Maria remembered that the cave was their hideaway when they were together. When Maria asks him when he was last there, he says that it was the night before she disappeared. Maria remembers that Ben had been having terrible headaches, and that she had been afraid of him. (thetvdb.com)