A scientist who was once romantically involved with Kirk and who helps search for a cure when the Enterprise officers begin aging rapidly.
Dr. Janet Wallace is an endocrinologist who boards the Enterprise in The Deadly Years. She and Kirk were in love years earlier, but their careers led them apart, and she married an older scientist, Theodore Wallace, who has since died.
After a landing party is exposed to radiation on Gamma Hydra IV and begins aging at a terrible rate, Wallace works alongside McCoy to find a treatment, while also confronting Kirk's decline. She was played by Sarah Marshall.