In honor of Star Trek's 50th anniversary this month, The Hollywood Reporter counted down the top 100 episodes of Star Trek — ranking them across all six TV series with help from the stars and writers who made them so beloved.
Now we're going to break it down even further — this time organizing the episodes by era. Every day through Friday, we'll be releasing a new list specific to each series, with the order is based on our original list of 100.
Here, we look at the best of the original series, which ran from 1966-69 saw Gene Roddenberry's vision brought to life by actors William Shatner (Spock), Leonard Nimoy (Spock), DeForest Kelley (Bones), Nichelle Nichols (Uhura), Walter Koenig (Chekov), George Takei (Sulu), and James Doohan (Scotty).
Below you'll find Shatner and Koenig reveal their favorite episodes, as well as hear from Star Trek Beyond director Justin Lin, two iconic Trek writers and many more.