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.

The Octagon
1980 · as Amy Lee

Semi-Tough
1977 · as Choir Leader (uncredited)

Once Upon a Spy
1980 · as Susan Webster

The Seniors
1978

Island Claws
1980 · as Jan Raines

The Scarlett O'Hara War
1980 · as Isobel

The Munsters' Revenge
1981 · as Marilyn Munster

Samurai
1979 · as Marianne

Visions of Christmas Past
1979 · as Margot Eldridge

Spiker
1985 · as Marcia Steinbech

7 Kills, 3 Songs & a Banana
2024