[5] Crosby played Kristin Shepard (Sue Ellen Ewing's scheming sister) on the prime time soap opera Dallas from 1979 to 1981, and a guest appearance in 1991.

Viewers had to wait all summer (and most of the fall due to a Hollywood actors' strike) to learn whether J.R. would survive, and which of his many enemies was responsible.

Once again the focus of a highly rated cliffhanger, it was revealed in the season opening episode (October 9, 1981) that it was Kristin's body floating in the Southfork Ranch swimming pool.

[11] She later made guest appearances on The Fall Guy, Glitter, Hammer House of Mystery and Suspense, Hotel and The Love Boat.

In 1985, Crosby starred in the ABC miniseries Hollywood Wives alongside Candice Bergen, Joanna Cassidy and Angie Dickinson based on the 1983 novel of the same name by Jackie Collins and produced by Aaron Spelling.

The following year, Crosby played Isabel Truscott Hazard in another ABC miniseries North and South, Book II.

On television, she guest-starred in In the Heat of the Night, Freddy's Nightmares, Murder, She Wrote, Lois & Clark: The New Adventures of Superman, Star Trek: Deep Space Nine, Dream On, Beverly Hills, 90210 and Orleans reuniting with Dallas' Larry Hagman.