Jocasta calls Oedipus out of the house - to gloat that the second prophecy has come to nothing, just like the first. Oedipus' father, Polybus, is dead! Oedipus joins his wife in celebrating the failure of prophecy. But what still worries him? He might have killed Laius? He might sleep with Merope? He might have to go back to Corinth?