Forsyth's television work includes Whatever Happened to the Likely Lads?, as Thelma (1973–74); The Glamour Girls (1980-82), as Veronica Haslett; Tom, Dick and Harriet (1983) as Harriet Maddison; The Practice, as Dr. Judith Vincent (1986); Sharon and Elsie, as Elsie Beecroft (1984–85); Dark Season (1991), as Miss Maitland; and Boon (ITV, 1989), as Helen Yeldham.
Gilmore Girls | Spice Girls | The Golden Girls | Indigo Girls | Boys & Girls Clubs of America | Girls Aloud | Wonder Girls | Sun City Girls | St Paul's Girls' School | Girls' Generation | Mean Girls | All-American Girls Professional Baseball League | Brazilian Girls | The Cheetah Girls | Nanyang Girls' High School | Twelve Girls Band | The Powerpuff Girls | The Incredibly True Adventure of Two Girls in Love | Girls' Brigade | Carry On Girls | Brown Eyed Girls | Boys Like Girls | Boys and Girls in America | Bad Girls | 2 Broke Girls | Two Girls and a Sailor | To All the Girls I've Loved Before | The Flash Girls | The Cheetah Girls (band) | The Cheeky Girls |