The Trial of Mary Dugan is a 1941 American drama/thriller directed by Norman Z. McLeod and written by Bayard Veiller. The film stars Laraine Day, Robert Young, Tom Conway, Frieda Inescort, John Litel, Marsha Hunt, Marjorie Main and Henry O'Neill. The film was released on February 14, 1941, by Metro-Goldwyn-Mayer.