In Agamemnon, Agamemnon is killed by his wife, Clytemnestra, and her lover when he returns from the Trojan War.
In The Libation Bearers, Clytemnestra is slain by by her children, Electra and Orestes.
In The Eumenides, Orestes is freed from the Furies and, through Athena, is reconciled to his homeland.