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How many crewmen/women die in the original series of Star Trek?


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.



Answer



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.



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