10 Most Re-Watchable Star Trek Episodes

10. Balance Of Terror

This episode was one of Star Trek's earliest examples of truly brilliant writing. The classic episode introduces one of the franchise's longest running antagonists - the Romulans. They are so iconic, in fact, that they continue to pop up as villains a full fifty years later on! And it all began here, with Mark Lenard's outstanding performance as the Romulan Commander.

There are so many moments that stand out in this episode. The beautiful design of the Romulan Bird-of-Prey makes its debut, along with the re-used Vulcan design for the Romulan people. The reaction of the bridge crew to the image of, what they believe, is a Vulcan man ordering the attack on their ship is a heart-stopping moment - followed by wise words from Captain Kirk.

Leave you bigotry in your quarters. There's no place for it on the bridge.

Everything about the episode works. It is effectively a submarine battle in space, with the Romulan cloaking device giving them a distinct advantage in the battle. However, the Enterprise is the more powerful ship, leaving the two in something of a stalemate for much of the run time. Mark Lenard sells every moment of his portrayal of the Romulan Commander, showing himself to be one of the most honourable representatives of his race, while also being a brilliant military tactician.

Absolutely essential viewing for any fan, while also being thoroughly enjoyable on multiple watches.