This "Electra"fying playwright gets the credit for adding a third actor to Greek tragedies
He is credited with changing 
Greek drama by adding a third actor, reducing the role of the chorus, and paying
... [DOC] [TLE] Study Guide Hecuba - Randolph College [PAR] What follows is background information of various sorts to get you oriented, and 
... A few suggestions on ways into the play and Greek drama.