WILDSTORM COMICS published multiple one-shot STAR TREK: THE NEXT GENERATION stories between 2000 and 2001. These intriguing adventures could be seen as additional episodes for the show.
This Star Trek Graphic Novel collects two of those adventures revolving around dreams and fears:
Embrace the Wolf The crew faces the violent entity Redjac again. It draws them into a familiar holodeck program: Victorian London, the home of Jack the Ripper.
Perchance to Dream Picard and the crew arrive on a Federation planet in the middle of a political conflict. They are attacked with a telepathic weapon that uses its victims’ worst fears against them.