First choral interlude.—The chorus reflects upon the oracle and the certain discovery of the guilty one. Ideal picture of the flight of the murderer. While troubled by the charge of Tiresias, the chorus still refuses to give it credence. After all, the seer is only a man and liable to be mistaken. Oedipus has shown himself a wiser man by solving the riddle of the Sphinx.
First choral interlude.—The chorus sings a dithyrambic strain in praise of the wonderful works of Bacchus. No reference is made to the tragedy which is in progress.
Second episode.—Quarrel of Oedipus and Creon based upon the charges of the former. Oedipus' argument: The deed was done long ago, and Tiresias, though then also a seer, made no charge. Now, when forced by the recent oracle, the seer comes forward with Creon. This looks like a conspiracy. Creon pleads for a fair and complete investigation. Jocasta tries to reconcile the two, but in vain, and Creon is driven out. Jocasta relates the circumstances of Laïus' death, which tally in all details but one with the death of one slain by Oedipus. A terrible conclusion begins to dawn upon the king. He tells his queen the story of his life and the dreadful oracle, the fear of the fulfilment of which drove him from Corinth. At the end of this episode the death of Laïus at the hands of Oedipus is all but proved, but the relation between the two is not yet hinted at.
Second episode.—Creon returns from the rites of necromancy in which he had accompanied Tiresias, and strives to avoid telling the result of the investigation to the king. Being at last forced to reveal all that he knows, he describes with great vividness of detail how Tiresias has summoned up the spirits of the dead, and among them Laïus. The latter declares that Oedipus himself is the murderer, having slain his father and married his mother. Oedipus, strong in the belief that Polybus and Merope of Corinth are his parents, denies the charge, and after a hot dispute orders Creon to be cast into prison, on suspicion of a conspiracy with Tiresias to deprive Oedipus of the scepter.
Second choral interlude.—Prayer for a life in accordance with the will of heaven. Under the shadow of impending ill, the chorus seeks the aid of God, meditates upon the doom of the unrighteous, and considers the seeming fallibility of the oracle.
Second choral interlude.—The chorus refuses to believe the charge against Oedipus, but lays the blame of all these ills upon the evil fate of Thebes which has pursued the Thebans from the first.
Third episode.—A messenger from Corinth brings the news of Polybus' death, the supposed father of Oedipus. The irony of fate: the king is lifted up with joy that now the oracle cannot be fulfilled that he should kill his own father. Step by step the details of the king's infancy come out, which reveal the awful truth to Jocasta. To Oedipus the only result of the present revelation is that he is probably base-born. Jocasta tries to deter Oedipus from further investigation.
Third episode.—Oedipus, remembering that he had slain a man on his way to Thebes, questions Jocasta more closely as to the circumstances of Laïus' death, and finding these circumstances to tally with his own experience, is convinced that he was indeed the slayer of Laïus.
At this point a messenger from Corinth, an old man, announces to Oedipus the death of Polybus, the king of Corinth, and the supposed father of Oedipus. The latter is summoned to the empty throne of Corinth. A quick succession of questions and answers brings to light the fact that Oedipus is not the child of Polybus and Merope, but that the messenger himself had given him when an infant to the Corinthian pair. This announcement removes the chief support of Oedipus against the charges of Tiresias, and now he rushes blindly on to know the rest of the fatal truth. The shepherd is summoned who had given the baby to the old Corinthian. He strives to avoid answering, but, driven on by the threats of Oedipus, he at last states that he had received the child from the royal household of Thebes, and that it was in fact the son of Jocasta. At this last and awful disclosure, Oedipus goes off the stage in a fit of raving madness.
Strophe and antistrophe.—A partial interlude, while they wait for the shepherd who is to furnish the last link in the chain of evidence. The chorus conjectures as to the wonderful birth of Oedipus; possibly his father is Pan, or Apollo, or Mercury, or Bacchus.