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 past, she was romantically involved with William Riker's father, Kyle Riker, with whom she has maintained a friendship.

Star Trek: The Next Generation (TNG) is an American science fiction television series created by Gene Roddenberry. It originally aired from September 28, 1987, to May 23, 1994, in syndication, spanning 178 episodes over seven seasons. The third series in the Star Trek franchise, it was inspired by Star Trek: The Original Series. Set in the latter third of the 24th century, when Earth is part of the United Federation of Planets, it follows the adventures of a Starfleet starship, the USS Enterprise (NCC-1701-D), in its exploration of the Alpha quadrant and Beta quadrant in the Milky Way galaxy.