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Real world article
(written from a production point of view)

The second season of Star Trek: The Original Series was produced and filmed from May 1967 to January 1968 by Desilu (and later Paramount Television). It began airing in the fall season on NBC, running new episodes from 15 September 1967 to 29 March 1968, and continuing in repeats until the premiere of TOS Season 3 in the fall of 1968. In the United Kingdom the season was shown on BBC1, which imposed its own episode running order not related to either the production order or NBC screening order.

Episodes

Watched? Title Episode Production number Stardate US release date Remastered airdate

"Catspaw" 2x01 60330 3018.2 1967-10-27 2006-10-28

"Metamorphosis" 2x02 60331 3219.8–3220.3 1967-11-10 2007-11-03

"Friday's Child" 2x03 60332 3497.2–3499.1 1967-12-01 2007-01-06

"Who Mourns for Adonais?" 2x04 60333 3468.1 1967-09-22 2008-01-12

"Amok Time" 2x05 60334 (5149-34) 3372.7 1967-09-15 2007-02-17

"The Doomsday Machine" 2x06 60335 4202.9 1967-10-20 2007-02-10

"Wolf in the Fold" 2x07 60336 3614.9–3615.4 1967-12-22 2007-03-10

"The Changeling" 2x08 60337 3541.9 1967-09-29 2008-02-02

"The Apple" 2x09 60338 (5149-38) 3715.0–3715.6 1967-10-13 2008-03-01

"Mirror, Mirror" 2x10 60339 (5149-39) Unknown 1967-10-06 2006-11-11

"The Deadly Years" 2x11 60340 3478.2–3479.4 1967-12-08 2007-11-10

"I, Mudd" 2x12 60341 (5149-41) 4513.3 1967-11-03 2006-10-14

"The Trouble with Tribbles" 2x13 60342 4523.3–4525.6 1967-12-29 2006-11-04

"Bread and Circuses" 2x14 60343 4040.7–4041.7 1968-03-15 2007-06-02

"Journey to Babel" 2x15 60344 3842.3–3843.4 1967-11-17 2007-02-03

"A Private Little War" 2x16 60345 4211.4–4211.8 1968-02-02 2008-05-17

"The Gamesters of Triskelion" 2x17 60346 3211.7–3259.2 1968-01-05 2007-10-20

"Obsession" 2x18 60347 3619.2–3620.7 1967-12-15 2008-04-12

"The Immunity Syndrome" 2x19 60348 4307.1–4309.4 1968-01-19 2007-04-07

"A Piece of the Action" 2x20 60349 Unknown 1968-01-12 2007-04-28

"By Any Other Name" 2x21 60350 4657.5–4658.9 1968-02-23 2008-03-08

"Return to Tomorrow" 2x22 60351 4768.3–4770.3 1968-02-09 2007-07-07

"Patterns of Force" 2x23 60352 Unknown 1968-02-16 2007-05-19

"The Ultimate Computer" 2x24 60353 4729.4–4731.3 1968-03-08 2008-02-09

"The Omega Glory" 2x25 60354 Unknown 1968-03-01 2007-06-30

"Assignment: Earth" 2x26 60355 Unknown 1968-03-29 2008-05-03

Summary

This season saw Ensign Pavel Chekov added to the regular bridge crew. Although his first appearance in "Catspaw" had him operating the science station, "Friday's Child" established him as the ship's primary navigator.

Following their introduction near the end of the previous season, the Klingons were established as major adversaries, appearing in three episodes, "Friday's Child", "The Trouble with Tribbles", and "A Private Little War". The second of those would turn out to be one of the show's most popular and influential episodes, introducing Koloth and the Tribbles, who reappeared on Deep Space 9, with other characters reappearing in the Star Trek: The Animated Series episode "More Tribbles, More Troubles". The Romulans also made a brief reappearance in "The Deadly Years" while Harry Mudd returned for a second tussle with the USS Enterprise crew in the comedic episode "I, Mudd". "Mirror, Mirror" saw Kirk and company paying a first visit to the mirror universe which also later featured prominently on Deep Space 9 and Star Trek: Discovery.

The show began to explore the rest of the Federation, with the Enterprise making its first trip to Vulcan as Spock underwent Pon farr in "Amok Time". "Journey to Babel" saw the Enterprise transporting representatives of the Vulcans, Andorians, and Tellarites to a conference to admit the Coridanites to the Federation, among them Spock's father Sarek. "Obsession" provided an insight into Kirk's early Starfleet career, revealing some of the details of his tour of duty on the USS Farragut.

Although most episodes centered around the triumvirate of Kirk, Spock, and McCoy, the other regular crewmembers began to appear more. After first commanding the ship in "The Return of the Archons", Scotty was firmly established as the Enterprise's third-in-command, with episodes like "Friday's Child", "The Apple", and "Bread and Circuses" giving screen time to his command. He was also given a spotlight in "Wolf in the Fold", in which he was accused of a series of murders. Chekov and Uhura were given a chance to accompany Kirk on an away mission in "The Gamesters of Triskelion" and Chekov also had a prominent role, and an opportunity for romance, in "The Apple". Sulu, on the other hand, was absent from nine consecutive episodes in the middle of the season, the result of a film George Takei was working on over-running.

The Enterprise visited several planets based on Earth history, either by coincidence or as a result of Human visitors, such as Ancient Rome ("Bread and Circuses"), Chicago gangsters ("A Piece of the Action"), Nazi Germany ("Patterns of Force") and the American Constitution ("The Omega Glory"). There were other surprising encounters with Zefram Cochrane, the father of warp technology ("Metamorphosis"), the Greek god Apollo ("Who Mourns for Adonais?") and a giant space amoeba ("The Immunity Syndrome").

The show continued Gene Roddenberry's original idea of political fables, with two episodes identified as providing somewhat opposing commentary on the Vietnam War. "A Private Little War" saw the Federation and the Klingons supporting opposing sides in a civil war, with Kirk talking of the need to maintain the balance of power, while "The Omega Glory" saw Kirk telling a race based around the American Constitution that the values of liberty and freedom of belief also applied to their enemies.

The season closed with "Assignment: Earth", a back door pilot for a proposed spin-off series which saw Kirk and Spock encountering Gary Seven, a man employed by mysterious aliens to watch over 20th century Earth.

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Previous season:
TOS Season 1
Seasons of
Star Trek: The Original Series
Next season:
TOS Season 3