The Theban plays comprise three plays: Oedipus Rex (also called Oedipus Tyrannus or Oedipus the King), Oedipus at Colonus, and Antigone. All three concern the fate of Thebes during and after the reign of King Oedipus. They have often been published under a single cover; but Sophocles wrote them for separate festival competitions, many years apart. The Theban plays are not a proper trilogy (i.e. three plays presented as a continuous narrative), nor an intentional series; they contain inconsistencies. The three plays involve the tale of Oedipus, who kills his father and marries his mother, not knowing they are his parents. His family is cursed for three generations. In Oedipus Rex, Oedipus is the protagonist. His infanticide is planned by his parents, Laius and Jocasta, to prevent him fulfilling a prophecy; but the servant entrusted with the infanticide passes the infant on, through a series of intermediaries, to a childless couple, who adopt him, not knowing his history. Oedipus eventually learns of the Delphic Oracle's prophecy of him, that he would kill his father, and marry his mother; he attempts to flee his fate... -Wikipedia