epeisodia

Epeisodia are the episodes, the action-driven scenes of ancient Greek tragedy. The term—plural of epeisodion—refers to the portions of a play in which characters engage in dialogue and propel the plot, as opposed to the choral odes that punctuate the action. Together with prologos, parodos, stasima, and exodos, epeisodia form the traditional structure of a tragedy.

In classical tragedy, the action is organized as a sequence of epeisodia separated by stasima (choral odes). Each episode presents conflicts, revelations, and turning points, typically culminating in a crisis or dramatic decision that the chorus then comments on in the following stasimon. The interplay between dialogue and chorus drives pace and emotional intensity.

Epeisodia serve as the principal vehicle for characterization and plot development. They showcase heroes, villains, and messengers, and often feature risk, rhetoric, and dramatic irony as the audience anticipates the consequences of the characters' choices.

Historically, the concept appears in Aristotle's Poetics as part of his account of tragedy's composition. In surviving plays by Aeschylus, Sophocles, and Euripides, episodes vary in length and number but share the common function of advancing action between chorus passages. The term also nourished the modern sense of an "episode" in serialized narrative.