Scene 1: A Street in Rome (The Feast of Lupercal):
Tribunes Flavius and Marullus confront a crowd of plebeians celebrating Caesar's triumph over Pompey's sons. Marullus delivers a blistering reprimand, exposing the fickleness of the masses: "You blocks, you stones, you worse than senseless things! / O you hard hearts, you cruel men of Rome, / Knew you not Pompey?" The tribunes disrobe Caesar's statues of decorative scarves to "pluck the feathers from Caesar's wings", preventing him from soaring above ordinary men.
Scene 2: The Lupercalia & Cassius's Seduction of Brutus:
As Caesar enters with Antony and Calpurnia, a Soothsayer cries out from the throng: "Beware the ides of March!" Caesar dismisses him as a "dreamer".
Once Caesar departs for the games, Cassius initiates his masterclass in psychological manipulation upon Brutus:
- Flattery & Mirror Imagery: Cassius tells Brutus that Rome looks to him, offering to be his "glass" (mirror) to reveal his hidden nobility.
- Exposing Caesar's Physical Frailty: Cassius recounts swimming the turbulent Tiber ("Accoutred as I was, I plunged in / And bade him follow...") where Caesar nearly drowned and cried, "Help me, Cassius, or I sink!" He describes Caesar trembling with fever in Spain, groaning "like a sick girl". Cassius expresses outrage that such a feeble mortal should bestride the world like a Colossus!
- Appeal to Ancestral Honor: Cassius invokes Brutus's ancestor, Lucius Junius Brutus, who drove out the Tarquin kings: "There was a Brutus once that would have brook'd / The eternal devil to keep his state in Rome / As easily as a king."
- Casca's Report of the Crown: Casca reveals in cynical prose that Antony offered Caesar a coronet three times; Caesar refused it reluctantly each time, and then suffered an epileptic seizure ("the falling-sickness").
Scene 3: The Tempest & Supernatural Omens:
A horrific night of thunder and lightning grips Rome. Casca trembles at unnatural portents: a slave's hand burning without scorching, a lion roaming harmlessly near the Capitol, men walking in sheets of fire, and the nocturnal screech-owl hooting at noon. While Casca fears divine wrath, Cassius bares his chest to the lightning, interpreting the tempest as a reflection of Rome's monstrous political state under Caesar. He enlists Cinna to plant forged letters in Brutus's window to finalize his recruitment.