I flashed my UV penlight on the obvious parts of the rooms: jars, racks, windows, ceiling, door, walls and door. No clue. That leaves me with the human cadavers. I focused my penlight first on the male body, popularly known by the Celestians as Romeo. I didn't find anything either. Finally, I looked at the female cadaver, of course named Juliet. I guess the clue's on Juliet, by process of elimination. But what part?