9. The Emergency Medical Holographic Program
In a new twist on an old Star Trek staple, the show's creators implanted a holographic program to run the ship's sick-bay, as opposed to the usual, living and breathing, chief medical officer. Gone were the days of the in-the-flesh doctors, "Bones" McCoy and Dr. Beverly Crusher, and instead we got Robert Picardo's fantastic holographic character, "The Doctor." Forced to run on a full-time basis due to Voyager's sudden relocation to the Delta Quadrant, sans a medical officer, The Doctor would become this series first person in search of the meaning of humanity, following in the footsteps of the great Data from the TNG series, and further advocating for full sentient status with help from Captain Janeway.