https://ew.com/tv/star-trek-the-original-series-essential-episodes/

Ready to explore (or revisit) strange new worlds and smart sci-fi adventure? Launch into the Final Frontier with our list of 10 essential episodes of the original Star Trek.


"Where No Man Has Gone Before" (Season 1, episode 3)

"The City on the Edge of Forever" (Season 1, episode 28)

"Space Seed" (Season 1, episode 22)

"Amok Time" (Season 2, episode 1)

"Mirror, Mirror" (Season 2, episode 4)

"The Trouble with Tribbles" (Season 2, episode 15)

"Balance of Terror" (Season 1, episode 14)

"The Corbomite Maneuver" (Season 1, episode 10)

"The Doomsday Machine" (Season 2, episode 6)

"Arena" (Season 1, episode 18)