When most people think of Star Trek, they of course think of Kirk and Spock. This isn’t surprising, as they were the star and the break-out character of the series, but it’s easy to forget that they were two members of a triumvirate that made up the essence of the show. Ship’s doctor Leonard “Bones” McCoy was the third, and just as integral in making Star Trek a joy to watch.
Source: io9 – Leonard ‘Bones’ McCoy Was the True Heart of Star Trek