Oedipus learns that a shepherd escaped from the incident and sends for the shepherd in the hopes that he will gain more information on Laius’ killer; if both Jocasta’s and Oedipus’s stories line up.
A messenger from Corinth appears and informs Oedipus that Polybus has died from sickness and Oedipus feels relieved he didn’t kill his father and that the prophecy is false.
The messenger then explains that Polybus is not actually Oedipus’ real father and Oedipus suddenly realizes there is still another side of the story and it was not what he expected it to be.
The herdsman (the shepherd) enters and he and the messenger reveal the truth about Oedipus’ origins. Jocasta gave her son to a Shepherd to kill prevent the prophecy but the Shepard could not bring himself to kill the baby so he took the baby to another country where he later gave the son to the Corinthian messenger.
Jocasta commits suicide after learning that the prophecy came to pass. Oedipus then decides to gauge his eyes out with Jocasta’s brooches and he finally “gains sight” by deciding to leave Thebes to rid the town of the “disease”, and explaining that that he would never be able to meet his parents in the Underworld with seeing eyes.
Take care of my daughters.
Oedipus asks Creon to take care of his daughters, since Creon is their uncle and will be the new king of Thebes, before exiling himself out of Thebes to rid the land of the curse.
I will take care of them. Now leave to rid this land of the plauge.