Palmer, Lieutenant

Star Trek: The Next Generation
Episode: TNG 250 - Second Chances

(Played by Dr. Mae Jemison)

Officer serving aboard the U.S.S. Enterprise NCC-1701-D in 2369. She was at the transporter console during the second beam-down window to Nervala IV, as the Riker "twins" investigated the bizarre transporter conditions that created "Tom" Riker years earlier.