In the fourth season of Star Trek: The Next Generation, the crew of the Enterprise explores alien cultures in all-new ways. Captain Jean-Luc Picard (Patrick Stewart) struggles with the nightmarish horror of assimilation into the hive-mind of the Borg. The ruthless empire of the Cardassians emerges as an important nemesis for the Federation. Suspicion of Romulan sabotage aboard the ship leads to a paranoid power struggle. And political maneuvers within the Klingon Empire draw Worf (Michael Dorn) into an inevitable civil war.