Star Trek: The Original Series - Season 2 May 2026

The birth of the Mirror Universe —and Spock’s iconic goatee.

This season leaned heavily into the Prime Directive and established the Federation as a diverse, multi-species organization. Star Trek: The Original Series - Season 2

Did you know Season 2 almost marked the end of Trek? It was the massive letter-writing campaign led by fans like Bjo Trimble that convinced NBC to bring the show back for a third season. We literally have the fans of 1968 to thank for the decades of Trek that followed! Fanlore notes that as many as a million letters may have been sent to save the series. The birth of the Mirror Universe —and Spock’s

We welcomed Pavel Chekov (and his notoriously awful early-season wig) to the bridge crew! The Heavy Hitters (Our Top Episodes): It was the massive letter-writing campaign led by

The first time we visited Vulcan, introducing the concept of Pon Farr and that legendary combat music.

A masterclass in suspense and one of the highest-rated episodes of the era.