suffering a malfunction, his core programming means that he literally can't help but be completely benevolent at all times, since he was created to be a Doctor and help people. Snark at people, hell yes! . Refuse to help them, never! In "Revulsion", the EMH and B'Elanna come across another sentient hologram who is the only survivor on a space station. It turns out that treating a self-aware program like an unfeeling tool is a good way to have it go insane and murder you. "The Darkling" has the EMH deciding to improve his program by incorporating aspects of famous people...guess which aspects end up surfacing? A truly evil twin is encountered in "Equinox", an EMH with its ethical subroutines deactivated (though this was an intentional act). In "Flesh and Blood", sentient holograms have been programmed as training tools for a race of hunters (including increased pain/fear reactions). After being endlessly killed only to be brought back to "life" again for more training sessions, the holograms evolve enough skill to kill their masters, whereupon they set forth on a crusade to liberate all sentient holograms whether they want it or not. And in "Dreadnought" and "Warhead", sentient weapons of mass destruction create problems when they misinterpret their orders. In "Prototype", two races of sentient robots wiped out their masters when they wanted to stop fighting and scrap their war machines. The only reason this happened was because of a disgruntled employee who has hacked the AI communication network and broadcasted