Medea(1969)

It's a movie about a woman who beheads her brother, stabs her children, and sends her lover's wife up in flames. For Maria Callas, it's a natural.

Based on the plot of Euripides' Medea. Medea centers on the barbarian protagonist as she finds her position in the Greek world threatened, and the revenge she takes against her husband Jason who has betrayed her for another woman.