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The Invisible Man Returns (1940)

IMDb: 6.5
1940

The owner of a coal mining operation, falsely imprisoned for fratricide, takes a drug to make him invisible, despite its side effect gradual madness

Three Smart Girls Grow Up (1939)

IMDb: 6.8
1939

Three sisters who believe life is going to be easy, now that their parents are back together, until one sister falls in love with anothers fiance, and the youngest sister plays matchmaker