Dr. Katherine Pulaski is a fictional medical doctor in the American science fiction television series Star Trek: The Next Generation. She served a rotation as the chief medical officer aboard the Federation starship USS Enterprise-D. During her time on the ship, her medical skills saved the lives of both Captain Jean-Luc Picard and Commander William Riker. She inadvertently caused Geordi LaForge to create a hologram of Professor Moriarty that became self-aware, after a bet involving the abilities of Lt. Commander Data . Pulaski seemed averse to most new technology and preferred to avoid the transporter, but was forced to rely on it to save her own life from a genetically-modified infection. Before arriving on the Enterprise-D, she previously served on the USS Repulse. For a time in her pas