I’ve never actually watched Dexter, but I gather it’s about someone compelled to murder people who chooses to murder only people where the world is improved by their death?
Slightly more specific and slightly less consequentialistic than that. He chooses to kill only other murderers, and usually only cold-blooded murderers who are unrepentant and likely to murder again, (example: one time he stopped when he realized his selected victim had only murdered the person that had raped him in prison).
But it’s not about improving the world really, sometimes he even sabotages the police investigation just so he can have these people to himself.
Slightly more specific and slightly less consequentialistic than that. He chooses to kill only other murderers, and usually only cold-blooded murderers who are unrepentant and likely to murder again, (example: one time he stopped when he realized his selected victim had only murdered the person that had raped him in prison).
But it’s not about improving the world really, sometimes he even sabotages the police investigation just so he can have these people to himself.