(written from a Production point of view)
Mary Thompson is an actress who appeared as a background actress in several episodes of Star Trek: The Next Generation and Star Trek: Voyager. As a background actress she received no credit for her appearances and was identified by the call sheets of the episode "Descent", dated Thursday 22 April 1993, and a makeup continuity Polaroid of her. On the latter one she was named Mary Thomson. Her Starfleet uniform was later sold off on the web.