Last night, BEHIND THE CAMERA: THE UNAUTHORIZED STORY OF "MORK & MINDY" aired on NBC. The story itself was interesting.  It's hard to say how factual it was, since it wasn't authorized, but Gary Marshall was involved, so it probably has some credit. However, what *was* absolutely amazing was the actor who played Robin Williams.  He was dead on.  His name is Chris Diamantopoulos.   more at: http://www.newsday.com/entertainment/tv/ny-ettel4202903apr04,0,7042327....