(written from a Production point of view)
Virginia Aldridge (born 1 September 1938; age 74) is the actress who appeared as Lieutenant Karen Tracy in "Wolf in the Fold", a second season episode of Star Trek: The Original Series. This was her last known television appearance.
Aldridge had previously appeared on the TV Westerns Cheyenne, Wagon Train, and The Rifleman, the latter of which featured Paul Fix and Bill Quinn as regular cast members. She also had supporting roles in the 1959 films High School Big Shot (co-starring Stanley Adams) and Riot in Juvenile Prison (with John Hoyt). She can also be seen in the classic 1967 family film The Gnome-Mobile along with Hal Baylor.
Aldridge went on to become a writer for such popular series as Dallas, Fame, Knight Rider, and Beauty and the Beast.