"Space Seed" , this episode was also the first to introduce the character of Khan Noonien Singh (Ricardo Montalban : November 25, 1920 - January 14, 2009) .
The best 'original' series episode to show someone who has no idea about "Star Trek" is the episode entitled "The Trouble with Tribbles". It captures the spirt of the original series perfectly.
The Star Trek episode The Cage can be found in the first season of the original television show. It was actually the pilot episode for the show, the first one that was shown.
The star date given in the first regular series episode of Star Trek is 1312.4
The Star Trek episode (44th)"The Trouble With Tribbles" had an original airdate of December 29, 1967 .
Lucile Ball
The first Star Trek episode was called 'The Cage.' It starred Jeffrey Hunter as Capt. Christopher Pike. The pilot was rejected. The episode was created in 1966, but did not air until October 1988. Parts of this episode were aired in the original series as flashbacks in the episode 'The Menagerie', which aired in November 1966. The series was picked up with William Shatner playing the role of Capt. James T. Kirk. The first episode of what is now referred to as Star Trek TOS (the orignal series) that aired is 'The Man Trap.' It was actually the 5th episode produced. There was a pilot for Star Trek TOS called 'Where No Man Has Gone Before.' This episode was the first produced, but the 3rd to air as part of the first season of Star Trek in 1966.
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Star Trek: The Original Series episode airdates can be found on Memory Alpha, the Star Trek Wiki.
In the original Star Trek series (September 8, 1966 to June 3, 1969) the episode is "Miri" where the planet has children as the only survivors of some type of plague .
In the Star Trek: The Next Generation episode Unification I, Spock's father Sarek dies at the age of 203.(Although Mark Lenard appeared as Sarek in only one episode of the original series, he ended up reprising the role of Sarek six more times:as the voice of Sarek in the animated series episode Yesteryear,in the movie Star Trek III: The Search for Spock,in the movie Star Trek IV: The Voyage Home,in the movie Star Trek VI: The Undiscovered Country,in the Star Trek: The Next Generation episode Sarek, andin the ST:TNG episode Unification I.)
Star Trek (the original series) premiered on September 8, 1966.(Note: The first pilot episode, "The Cage", was completed between November 1964 and January 1965, however, it did not air on TV for the first time as a standalone episode until October 4, 1988.)
it first appeared in the 1960's for 3 series