between the matter and anti-matter on the Enterprise, ensuring the ship will explode unless Kirk's force emerges victorious in four hours. Kirk and the others begin to manufacture spears. Surak, whose life experiences have taught him that persistent efforts at peace are the best course, obtains permission to go alone to the enemy camp and negotiate. Green's group kills Surak and lures the others in by mimicking Surak crying for help. Lincoln offers to sneak around and free Surak while Kirk and Spock provide a diversion. When Lincoln arrives, he finds Surak's corpse and the waiting Kahless and Green, who kill him. Though now outnumbered two-to-one, when Kirk and Spock confront Green's group in battle, they quickly flee after Kirk kills Kahless and Green. Despite the conditions of a fight to the death remaining unfulfilled, Yarnek announces that the experiment is over. He concludes that there is nothing different between good and evil because the methods used to fight each other are the same. Kirk explains that the similar methods of how the two fight each other does not define them as the same. What defines them is the things for which each of them fight-Kirk and Spock were fighting for the survival of the Enterprise; the others fought for Power. The Excalbians allow Kirk and Spock to return to the Enterprise. Though the mystery of Lincoln and Surak remains unsolved, Spock offers the conjecture that the Excalbians, using their apparent ability to transform matter, transformed other living beings into the likenesses of Lincoln and Surak, then tapped Kirk and Spock's minds to create the personalities which they imagined those historical figures had. Reception In 2017, Screen Rant ranked this episode the 12th worst episode of the Star Trek franchise and in 2018 ranked it as the 9th worst. Legacy The costume created for Colonel Phillip Green was thought to have been recycled later as Mork's red spacesuit (but with the white triangle) on both Happy Days and Mork & Mindy. Releases "All Our Yesterdays" and "The Savage Curtain" were released on LaserDisc in the United States in 1985. This episode was released in Japan on December 21, 1993 as part of the complete season 3 LaserDisc set, Star Trek: Original Series log.3. A trailer for this and the other episodes was also included, and the episode had English and Japanese audio tracks. The cover script was スター・トレック TVサードシーズン This