Medea is an ancient Greek tragedy written by Euripides. It is based upon the myth of Jason and Medea and was first produced in 431 BC as part of a trilogy; the two other plays have not survived. The plot centers on the actions of Medea, a former princess of the kingdom of Colchis, and the wife of Jason; she finds her position in the Greek world threatened as Jason leaves her for a Greek princess of Corinth. Medea takes vengeance on Jason by murdering his new wife and her own two sons, after which she escapes to Athens to start a new life.

Jason was an ancient Greek mythological hero and leader of the Argonauts, whose quest for the Golden Fleece is featured in Greek literature. He was the son of Aeson, the rightful king of Iolcos. He was married to the sorceress Medea, the granddaughter of the sungod Helios. He was also the great-grandson of the messenger god Hermes, through his mother's side.