I have two observations and/or questions.
1.) In this shot from "Where No Man Has Gone Before" (http://tos.trekcore.com/hd/albums/1x...eforehd271.jpg
), the play of light and shadows make me think there was a lamp or lamps behind the wall against which the bed was set.
2.) On the biobed monitor, there is the "Recorder" indicator which always appeared in the on position. How did someone turn off this recorder?