The Romulans are introduced with a vengeance in this classic episode of Star Trek. The excitement never lets up for a second in this gripping episode. Though he is best known in Star Trek as Vulcan Ambassador Sarek, the late Mark Leonard gives a terrific performance as the Romulan commander in his first ever appearance on the show. What's especially good is watching how Kirk and the Romulan Commander strategize throughout the battle. Their individual scenes are very well done and entertaining. What's also very well done is the brief history of the Romulans as told by Spock. Excellent episode.