Ep 10. All Our Yesterdays

In the Star Trek: The Original Series (Remastered), Best of season 1 episode 10, titled "All Our Yesterdays", the USS Enterprise crew responds to a distress signal from a planet that is about to succumb to a supernova. Upon beaming down to the planet, they discover that its inhabitants have abandoned their civilization and retreated to the safety of the planet's past via a sophisticated time portal.

While Captain Kirk, Mr. Spock, and Dr. McCoy search for the missing inhabitants, they become trapped in the planet's past themselves. Kirk finds himself whisked away to a medieval European-style village, where he is accused of being a sorcerer and sentenced to death. Meanwhile, Spock and McCoy are transported to a prehistoric era, where they must fend off danger from predators and try to find a way to send a signal back to the present to rescue Kirk.

As they try to navigate their respective time periods and find a way back to the present, all three crew members confront complex moral dilemmas and emotional situations. Kirk becomes romantically involved with a woman named Zarabeth, who has also been trapped in the past, while Spock confronts his own inner conflict between his Vulcan and human sides. McCoy, on the other hand, confronts his fear of the unknown when he discovers an advanced alien race that developed on the planet before the present inhabitants.

"All Our Yesterdays" is a poignant and captivating episode that showcases the depth and complexity of the Star Trek universe. The time-traveling elements and the diverse and intricate plot line keep viewers on the edge of their seats, while the exploration of complex emotions and moral quandaries adds depth and nuance to the story. Overall, this episode is a true gem of the Star Trek franchise and a must-see for any fan of the series.