Johnson has worked steadily in several popular TV shows following her turn as the teacher/counselor who is married to Tibbs in the series. The actress's character was written out of the show along with Rollins's, but following the show, Johnson landed another popular network program: In Living Color, in which she was featured for 23 episodes between 1993 and 1994.

The rest of her IMDB page is a long list of notable series. Johnson has roles on Living Single, Babylon 5, Murder She Wrote, Melrose Place, ER, Ally McBeal, Dharma & Greg, Bones, Boston Legal, and The Secret Life of the American Teenager, along with a recurring, 18-episode role in JAG and five episodes in House of Payne. Most recently she was featured on NCIS and How to Get Away With Murder.