McCoy and Spock. Eventually Kirk is able to talk with them. Unwilling to leave Zarabeth, and unaware he will die if he remains in the past, Spock tries sending McCoy through the portal alone. However, because McCoy and Spock went through the portal together, neither one can return without the other. Upon their return, Atoz hurries through the portal. Spock reverts to his normal self, and they are beamed back to the Enterprise. Reception In 2015, SyFy ranked this episode as one of the top ten essential Star Trek original series Spock episodes. In 2016, The Hollywood Reporter rated "All Our Yesterdays" the 39th best episode of all Star Trek episodes. In 2016, SyFy ranked "All Our Yesterdays" as the 12th best time-travel plot of all episodes of the Star Trek franchise. They point out the episode offered fresh perspective on time travel by exploring the past of an alien world, as well as an interesting exploration of the characters Kirk, Spock, and McCoy. A 2018 Star Trek binge-watching guide by Den of Geek, recommended this episode for featuring the trio of characters Kirk, Spock, and Bones of the original series. In 2019, Nerdist News included this episode on their "Best of Spock" binge-watching guide. They also ranked it the tenth best time travel episode of the Star Trek franchise, including the later 750+ episodes. They note this episode for featuring Spock's travels to an ancient ice age of an alien world, and at that time his emotions are triggered by a woman and the effects of time travel. In the series, they remarked that normally the character does not have much emotion, so seeing the character deal with emotions provides a change of pace for the character's presentation. Sequels Author Ann C. Crispin wrote two non-canon novel sequels to this episode, titled Yesterday's Son, and Time for Yesterday. 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 episode was included in TOS Season 3 remastered DVD box set, with the remastered version of this episode. See also Atavachron, an