Babi, re # 26
With respect, only the second and third drama of Sophocles' Theban Plays take place on the same day in the same location with the same characters.
The first one, Oedipus the King, provides the essential family background : that before Oedipus' birth, his father, King Laius and wife, Quen Jocasta, were told by the Oracle that the child she was expecting would kill his father and marry his own mother. To preven any of this, King Laius ordered the baby killed. Instead, the baby was rescued and raised with loving parents, who failed to tell him that he was not their own son. Oedipus had heard rumors to that effect and, blessed by the parents, set out to discover the gtruth. Sufiffice it to say, the prophecy was ulfilled.
IMHO we cannot fully understand Antigone unless we are aware of the tragic family background andt he inevitability of the ending.
There is much information available on line on e.g. Oedipus,Creon, and especially Antigone. We have much to learn about all of them, don't we ?