McDonnell is perhaps best known for films and television series as The Octagon, Spiker, Semi-Tough, Dallas, T. J. Hooker and her role as the new Marilyn Munster in the 1981 television film The Munsters' Revenge.

Filmography4 titles

T. J. Hooker
TV1982
Officer Kelly Sanders
2 episodes
The Octagon
Movie1980
Amy Lee
Dallas
TV1978
Maureen
1 episode
Semi-Tough
Movie1977
Choir Leader (uncredited)