October 18, 1968 –
The Star Trek episode Is There in Truth No Beauty? premiered on this date. In it, the Enterprise travels with an alien ambassador who must travel inside a special black case because his appearance causes insanity.
The Vulcan IDIC was inserted into the script and into the episode at the behest of Gene Roddenberry, who wanted to sell the prop as an item at his Lincoln Enterprises. Nimoy, Shatner, and others were outraged at this, and Roddenberry was called to the set to negotiate with the actors. Finally, he agreed to rewrite the dinner scene. The IDIC symbol was used, but in a much less prominent way.
The Haus of Dcaligari 