In the late 1990s, Harmon became better known when she joined the NBC series Law & Order, playing ADA Abbie Carmichael from 1998 to 2001. During this time, she also voiced Barbara Gordon in the animated film Batman Beyond: Return of the Joker, succeeding Stockard Channing in that role. Harmon left Law & Order to concentrate on her film career, saying that she preferred working in film to television.
