didactic
\dy-DAK-tik; duh-\, adjective:
1. Fitted or intended to teach; conveying instruction; instructive; teaching some moral lesson; as, "didactic essays."
2. Inclined to teach or moralize excessively; moralistic.
The show trial may be defined as a public theatrical performance in the form of a trial, didactic in purpose, intended not to establish the guilt of the accused but rather to demonstrate the heinousness of the person's crimes.
