Madame X (Greek title: I Agnostos) is a 1954 Greek drama film directed by Orestis Laskos. It is based on the 1908 play by French playwright Alexandre Bisson (1848-1912). Thrown out of her home by a jealous husband, a woman sinks into degradation. Twenty years later, she is charged with killing a man bent on harming her son. The son, unaware of who the woman is, takes the assignment to defend her in court.