Crown was a Lieutenant in the United States Marine Corps and a member of the Atlantis expedition who was present during the first year of operation. When Dr. Peterson, after coming into contact with the Ancient nanovirus, transported into the Mess hall and affected those there, Lt. Crown was among them. After suffering from a hallucination caused by the nanites, she tackled Teyla Emmagan, accidentally making a cut in the Hazmat suit she was wearing and infecting Teyla. She was later cured by an EMP caused by an exploding Naquadah Reactor over the planet. (SGA: "Hot Zone")
- Crown appears to be one of two commissioned officers (the other being Lieutenant Miller) not on the first Atlantis team of the original Atlantis expedition. All other mentioned military personnel are enlisted.