The document provides background information on the Greek tragedy Oedipus the King by Sophocles. It summarizes the main plot points, including that Oedipus searches for his father's murderer unaware that he himself fulfilled a prophecy by killing his father Laius and marrying his mother Jocasta. It also discusses the characters of Antigone, Ismene, Eteocles, and Polyneices. Additional context is given around prophecies, Apollo and the Oracle at Delphi, and characteristics of a tragic hero according to Aristotle like hamartia and dramatic irony.