The doctor begins giving Joan directions, having her open and close her eyes, then having her breathe deeply. She holds a strobe light over her face, the light flashing at different speeds.

After a few minutes of those tests, the doctor leans down to Joan.

"All right...just relax and sleep if you can."

Joan smiles a little, her eyes closed. "That won't be hard," she murmurs.

The doctor stands back, looking at the display on the machine. Sherlock looks over at the display as well, frowning faintly. Slowly the brain waves, scribbles on the screen, start to smooth out into long slopes.

Joan's asleep.