'' Lost Boundaries '' is a 1949 American film directed by Alfred L. Werker that stars Beatrice Pearson , Mel Ferrer ( in his first starring role ) , and Susan Douglas Rubeš . The film is based on William Lindsay White 's book of the same title , a nonfiction account of Dr. Albert C. Johnston and his family , who passed for white while living in New England in the 1930s and 1940s . The film won the 1949 Cannes Film Festival award for Best Screenplay
1949 Cannes Film Festival
1949 Cannes Film Festival
Lost Boundaries