Not every Vulcan in Star Trek is as heroic and virtuous as Spock (Leonard Nimoy), and there are a half dozen of the pointy-eared aliens who can be called downright evil. Vulcans are normally the staunchest allies of humans in the United Federation of Planets. It was with the help of the Vulcans that Mankind rose from the 21st-century ashes of World War III and built an intergalactic alliance of planets within the next two hundred years. In Star Trek: Discovery's 32nd century, Vulcans and Romulans share the planet Ni'Var and remain loyal friends with the humans of the Federation.
Some of Star Trek's Vulcan heroes include Spock, T'Pol (Jolene Blalock) in Star Trek: Enterprise, and Tuvok (Tim Russ) in Star Trek: Voyager. Vulcans traditionally embrace logic and reject emotion, but the truth is that some Vulcans can also be power kegs after a lifetime of repression. In other cases, Vulcan logic leads them to take a course of action that is disastrous. And yes, some Vulcans have resorted to murder. Vulcans never forget that thousands of years ago, they were as violent and filled with rage as the worst humans or Klingons, and it was the Vulcan commitment to logic that tempered their cauldrons of emotions. However, Star Trek has also introduced a number of villainous Vulcans across the various series and films. Here are six of the most nefarious Vulcans who broke bad throughout Star Trek.