Designer Andy Probert thought that the main viewer might not be a 
simple two-dimensional flat screen, and suggested that it might actually be a 
holographic display.  Star TrekÕs visual effects supervisors thought this was 
a neat idea, but ran into an interesting problem:  How do you show that a 
screen is three-dimensional on a two-dimensional television show? Their 
ingenious solution was to show an occasional shot of the screen at an 
oblique angle (instead of the normal head-on view), while showing the 
subject on the screen at the same oblique angle.  Æ