"Balance of Terror", written by Paul Schneider and directed by Vincent McEveety, is a first-season episode of the original science fiction television series Star Trek that first aired on December 15, 1966. It was repeated on August 3, 1967. The episode is a science-fiction version of a submarine film; writer Paul Schneider drew on the films Run Silent, Run Deep and The Enemy Below, casting the Enterprise as a surface vessel and the Romulan vessel as a submarine. This episode introduces the Romulans. Additionally, Mark Lenard, playing the Romulan commander, makes his first Star Trek appearance. Lenard later played Spock's Vulcan father, Sarek, in several episodes and movies, and appears as the Klingon commander in Star Trek: The Motion Picture. These roles made Lenard the first actor to play characters of three prominent Star Trek races. On September 16, 2006, "Balance of Terror" became the first digitally remastered Star Trek episode, featuring enhanced and new visual effects, to be broadcast. Wikipedia [ - ]

"Balance of Terror", written by Paul Schneider and directed by Vincent McEveety, is a... [ + ]