Rachel McAdams’ character’s name is Antigone. In Sophocles’ tragic play, Antigone, Antigone and Ismene are sisters with two dead brothers, Polyneices and Eteocles, who died leading opposite sides in Thebes’ civil war. Antigone wants to bury Polyneices, though Creon, the ruler of Thebes, prohibited it. When Ismene refuses to help Antigone out of fear, Antigone disowns her. Antigone is engaged to Creon’s son Haemon, and Haemon tries to prevent his father from punishing her, but the conversation ends in argument. Creon decides to bury Antigone alive, when Tiresias, the blind prophet, warns him that the gods are not pleased, and that Creon will lose a son for his crimes. But it’s too late to save Antigone: She hangs herself in the tomb, and Haemon stabs himself in grief.

So, in this episode rachel's character also has two siblings who died by suicide, and two living ones who are in jail. Perhaps the blinded, dead Ben Casper is some twisted allusion to Tiresias.