Visible crew/equipment: When Alba says "He's in this room" books start flying off the shelves. You can see the device used to push the books off the shelves come forward then be retracted. (00:41:00)
Visible crew/equipment: At the very beginning of the episode, Nero's ghost appears and raises a knife to attack the heroes, the wires used to move the knife across the room are visible most of the time.
