(written from a Production point of view)
Mary Kohnert is the actress who appeared as Ensign Tess Allenby in the Star Trek: The Next Generation fourth season episodes "Final Mission" and "The Loss". Stock footage of her from "Final Mission" was later included in the sixth season episode "Suspicions".
Her previous television credits include episodes of Highway to Heaven (1987), Freddy's Nightmares (1989, with Andrew Prine, Walter Gotell, Albert Hall, and J. Teddy Davis), Nightmare Classics (1989, with Nicholas Guest and George Murdock), and Hunter (1990, with Clint Howard and William Smithers).
She made her film debut with a supporting role in the television movie 2 1/2 Dads (1986, with Lenore Kasdorf). She also appeared in the films Valet Girls (1987, with Charles Cooper), Big Man on Campus (1989, with Armin Shimerman, Gerrit Graham, and Cynthia Gouw), Beyond the Door III (1989), Mr. Baseball (1992, with Nicholas Cascone), and the 1992 made-for-TV movie Desperate Choices: To Save My Child with Bruce Davison, Bruce McGill, and Ron Canada.