We like to think of the process of cyborgification as simply adding non-sentient metal parts to be controlled by our human consciousness. But what if the robot bits were the consciousness? Ergo, the Borg, one of the longest-running Star Trek foes. Probably the most interesting example of the Borg is Seven of Nine from Star Trek: Voyager. Rescued by the crew and severed from the Borg collective, the bodacious Seven had to re-adjust to those pesky human feelings while using her advanced capabilities to help the ship.