Dr. Lewis Zimmerman is the StarFleet officer and scientist, responsible for designing and programming the database for the Emergency medical Hologram (EMH). This work was executed when he was stationed at Jupiter Station in the solar system of earth. At first sight Zimmerman seems arrogant, he is irritated by people who are less intelligent then himself. He is very proud of his creation, he doesn't understand that the EMH wants to explore himself as more then just a good doctor. Zimmerman can't accept that what he sees as a tool, other crew members see as a human being. He has designed a diagnostic matrix to support the EMH.