In the opening scenes of the pilot, we saw the Man in Black (who we know now is William) attack Dolores and Teddy. But we still don't know exactly what he did to her behind closed doors.
"We saw her dragged away but we didn't see what happened in the barn," Joy told INSIDER. "And in a moment in episode three, we learn that maybe not everything was what it seemed in that scene."
In the flashback Dolores has, we see the Man in Black turn to Dolores while pulling out his knife. "Why don't we reacquaint ourselves, Dolores," he says. "Start at the beginning."
According to Joy, Dolores may have had something to do with the maze. "What he says to her, it indicates that he's dragging her there because he' s looking for something," she says. "He's looking for a deeper level of the game, and he's going to do whatever he needs to do to get to it."