Editing Spock's Brain (section)

{{Use American English|date=October 2023}}
{{Use mdy dates|date=October 2023}}
{{Infobox television episode
| series = [[Star Trek: The Original Series]]
| image = Leonard Nimoy William Shatner Spock's Brain Star Trek 1968.JPG
| caption = On Kirk's command, Spock grabs Kara's wrist to deactivate her bracelet.
| season = 3
| episode = 1
| airdate = {{Start date|1968|9|20}}
| production = 061
| writer = [[Gene L. Coon|Lee Cronin]]
| director = [[Marc Daniels]]
| music = [[Fred Steiner]]
| photographer = [[Gerald Finnerman|Jerry Finnerman]]
| guests = 
* [[Marj Dusay]] as Kara
* Sheila Leighton as Luma
* James Daris as Morg
| prev = [[Assignment: Earth]]
| next = [[The Enterprise Incident|The ''Enterprise'' Incident]]
| episode_list = List of Star Trek: The Original Series episodes
| season_article = Star Trek: The Original Series season 3
}}

"'''Spock's Brain'''" is the [[Star Trek: The Original Series season 3|third season]] [[premiere]] episode of the American [[science fiction]] television series ''[[Star Trek: The Original Series|Star Trek]]''. Written by [[Gene L. Coon]] (under the pseudonym ''Lee Cronin'') and directed by [[Marc Daniels]], it was first broadcast on September 20, 1968.

During the episode, an alien female played by [[Marj Dusay]] beams aboard the ''Enterprise'' and, after incapacitating the rest of the crew, surgically removes [[Spock]]'s [[brain]]. Captain [[James T. Kirk|Kirk]] and the crew have just hours to locate and restore it before Spock's body dies.

Widely regarded as the worst episode of the series, it was the first to air after NBC moved the show from 8:30&nbsp;p.m. to [[Friday night death slot|10 p.m. on Friday nights]].