Dramatis Personae + 

Agamemnon, son of Atreus and King of Argos and Mycenae; Commander-in-Chief of the Greek armies in the War against Troy + 

Clytemnestra, daughter of Tyndareus, sister of Helen; wife to Agamemnon + 

Aigisthos, son of Thyestes, cousin and blood-enemy to Agamemnon, lover to Clytemnestra + 

Cassandra, daughter of Priam, King of Troy, a prophetess; now slave to Agamemnon + 

A Watchman + 

A Herald + 

Chorus of Argive Elders, faithful to Agamemnon + 

Menelaus, brother to Agamemnon, husband of Helen, and King of Sparta + 

The two sons of Atreus are called the Atreidae + 

Helen, most beautiful of women; daughter of Tyndareus, wife to Menelaus; beloved and carried off by Paris + 

Paris, son of Priam, King of Troy, lover of Helen. Also called Alexander + 

Priam, the aged King of Troy + 

The Greeks are also referred to as Achaians, Argives, Danaans; Troy is also called Ilion + 