|Date(s):||First aired: 20 September 1968|
|Fandom:||Star Trek: The Original Series|
|External Links:||synopsis at Memory Alpha|
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Spock's Brain is generally considered to be the worst episode of the original Star Trek series. After the show was cancelled and started airing in reruns, it became a truth universally acknowledged that if you tried to get your friends interested in Star Trek, the episode on that day would inevitably be "Spock's Brain."