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I've decided to watch the original Star Trek series from the beginning starting with "The Man Trap" (I know there were pilot episodes before that). In that episode alone 4 crewmen get "de-salted" which is a hefty loss of personnel in one go so I wondered what was the series total of fatalities amongst the crew.

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Memory Alpha's list of TOS fatalities (complete with pictures) among the Enterprise crew only is as follows:

Entry from Matthew Barsalou's analysis provided by Memory Alpha's data.

Enterprise NCC 1701 casualties from episodes aired between September 8, 1966 and June 03, 1969 based on casualty figures from Memory Alpha. Note: Table does not contain casualties from the Mirror Universe or anybody killed and resurrected during an episode.

A very interesting analysis done by mathematician, Matthew Barsalou, points out it was not the color of the shirt per se which caused the deaths of the crew (as the running joke about red shirts and expendability imply) but the occupation which made the red shirt appear to be as dangerous as it did onscreen.

His math points out it was the occupation of security for the ship which made wearing a red shirt so dangerous, as over 20% of the security detail died during the run of the show. You can enjoy the calculations and how he arrives at them in his article in Significance Magazine (a magazine about statistical analysis)

Using what is known about Enterprise crew and casualty figures, suppose an Enterprise crew member has been killed. Discarding the 15 unknown casualties, redshirts consist of 60.0% of all fatalities where the uniform color is known; blue and gold uniforms are the remaining 40.0% of casualties. Redshirts are only 52.0% of the entire crew, but 60.0% of casualties, so what is the probability that the latest casualty was wearing a redshirt? The Enterprise often visits Starbases and takes on new crew members, so we assume sampling with replacement. Otherwise, the population size would change every time a crew member is killed... There is a 61.9% chance that any given casualty is wearing a redshirt.

  • Cheers. That seems as accurate as one can get. – camden_kid Feb 19 '14 at 9:47
  • The table is flawed, you can't have 15 / 0 people die. That total for total population should at least be 445, and the death ration no higher than 12.3%, but even that's a stretch as there are many many "unknown uniform" individuals in the universe... – Jay Carr Sep 8 '16 at 23:50
  • There is also the phenomenon of selective memory and pattern recognition. More red-shirted crewmembers bought the farm than crewmembers wearing any other single color, so we tend to remember it as "it was always the one in the red shirt". – Anthony X Feb 18 '17 at 2:00
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When searching for Spock (or anything else Star Trek related :-)), Memory Alpha is the definitive source to reference.

According to Memory Alpha, the answer is 57:
http://en.memory-alpha.org/wiki/Starfleet_casualties_(23rd_century)

"In the novelization of Star Trek: The Motion Picture, written by Gene Roddenberry, Admiral Kirk states in his forward that during his five years in command of Enterprise, a total of 96 of his crew perished. No persons were killed in The Animated Series that depicted the remainder of the five-year mission, making the on-screen Enterprise death toll stand at fifty-seven (not counting revivals, and including the deaths of Leslie and Galloway)."

This matches closely to the Redshirt Wiki listing of 59. http://en.wikipedia.org/wiki/Redshirt_(character)

Per the Redshirt Character article, analysis of the original Star Trek episodes shows that 59 Enterprise crew members were directly killed in the series (I assume that means onscreen and/or referenced on-screen). Not surprisingly (hence the source of the Wiki Name) 43 of those or about 73% were wearing Red Shirts.

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