"We did research. Tracked it down. This was fifteen years ago, man. One example," he makes clear, letting his gaze fall back on the mirror. Like Doc, he sees the figure is in a different place altogether. He was where Dean was standing, but not he is further away.

Watching the mirror, Dean backs away, one foot behind the other as he keeps his eye on the mirror and lines up with where the shadow would be.

"Whoever it is," he figures, looking beside him. "They're not here, then. They're in there." Or, they can only be seen inside the mirror. He doesn't actually know. Doc should realize Dean is not the be all and end all of what should happen or be done. "It. Her."

Him?

"Maybe, if we check all the mirrors, they'll all have writing." And maybe that writing will lead them to the original.