The most important thing from Act I is when Cassius talks to Brutus about his plan to kill Caesar. This is important because this is what the show is based around. If Caesar wasn't killed then it would not be a tragedy. "Into what dangers would you lead me, Cassius, That you would have me seek into myself for that which is not in me? (I: ii: ln 63-65).
Act IV: Sc III
I will see you at Philippi
The most important thing in Act II is when Calpurnia convinces Caesar to stay home because of her nightmare, but Decius convinces him again to go to the Senate. This is important because if Decius doesn't convince him to go to the Senate, then their plan to kill Caesar won't happen. "This dream is all amiss interpreted; It was a vision fair and fortunate (II: ii: ln 83-84).
Act V: Sc V
The most important thing in Act III is when Caesar gets killed by the conspirators. This is important because the story is named after this one moment in the story and it sets up the war in Act V. "Et tu Bruté? Then fall, Caesar" (III: i: ln 79).
THEME Act III: Sc I
The most important thing in Act IV is when the ghost of Caesar visits Brutus' dream. This is important because it foreshadows the death of Brutus in Act V. It also makes Brutus wake all of the soldiers up and commands them to start going to Philippi. "To tell thee thou shalt see me at Philippi" (IV: iii: ln 283).
The most important part of Act IV is when Brutus kills himself and Antony calls him the noblest roman of them all. This is important because it ends the war. Also, it shows that Brutus made an impact on not only his allies, but his enemies as well. "This was the noblest Roman of them all" (V: v: ln 68).
He is the noblest of them all
The theme of this story is to always be humble and to not be arrogant and ambitious. The scene that shows this is Act 3, Scene 1, where Caesar was killed. Caesar had multiple hints that something bad was happened but he was too good to listen to the hints and he was killed. "Then fall, Caesar" (III: i: ln 79).