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Marlene Schmidt averages 5.10 across 2 rated films as a writer, ahead of Howard Avedis at 4.97.
Dot size shows IMDb votes. Films with fewer than 1,000 votes sit on the baseline.
| The Stepmother | 1972 | · | Director, Writer, Producer | as Sonya Hill |
| The Teacher | 1974 | 4.7 | Producer, Writer, Director | as Alice Roberts |
| The Fifth Floor | 1978 | · | Writer, Producer, Director | Writer |
| Separate Ways | 1981 | · | Producer, Writer, Director | Writer |
| Mortuary | 1982 | 5.1 | Writer, Producer, Director | Writer, Producer, Actor |
| They're Playing with Fire | 1984 | 5.1 | Producer, Director, Writer | Producer, Writer |
| Kidnapped | 1987 | · | Director, Writer | Producer |