- ACT III, Scene 1:
- Both the Soothsayer and Artemidorus try to warn Caesar outside the Capitol, but he refuses to listen to them.
- Once Caesar goes into the Capitol, the conspirators gather around him, pretending to plead a case. Then, without warning, they all stab Caesar to death.
- Mark Antony flees, but Brutus persuades the conspirators to let him live. Brutus plans to explain the reasons for the killing to the Roman people.
- Antony returns and pretends to be an ally of the conspirators. Secretly, however, he plans to strike back with help from Octavius Caesar, who is now on his way to Rome.
- Scene 2:
- Brutus speaks before a group of "citizens," or common people of Rome. He explains why Caesar had to be slain for the good of Rome.
- Then, Brutus leaves and Antony speaks to the citizens. A far better judge of human nature than Brutus, Antony cleverly manages to turn the crowd against the conspirators by telling them of Caesar's good works and his concern for the people, as proven by the slain ruler's will. He has left all his wealth to the people.
- As Antony stirs the citizens to pursue the assassins and kill them, he learns that Octavius has arrived in Rome and that Brutus and Cassius have fled.
- Scene 3:
- This scene involves a famous Roman poet named Cinna. (He is not the same Cinna who participated in the assassination.)
- The angry Roman mob comes upon the poet, believing he is Cinna the conspirator. Soon, they realize this is the wrong man, yet they are so enraged that they slay him anyway. Then, they rush through the city after the true killers of Caesar.