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.
20247 Kills, 3 Songs & a BananaMovie1985SpikerMovieas Marcia Steinbech1982T. J. HookerTV showas Officer Kelly Sanders · as Sarah Campbell · 1 episodes1981The Munsters' RevengeMovieas Marilyn Munster1980Once Upon a SpyMovieas Susan Webster1980The OctagonMovieas Amy Lee1980The Scarlett O'Hara WarMovieas Isobel1980Island ClawsMovieas Jan Raines1979Visions of Christmas PastMovieas Margot Eldridge1979Hart to HartTV showas Elise · 1 episodes1979SamuraiMovieas Marianne1979Mrs. ColumboTV showas Eileen · 1 episodes1978The SeniorsMovie1978DallasTV showas Maureen · 1 episodes1977Semi-ToughMovieas Choir Leader (uncredited)