For Act 1 I chose to do the first scene. This is important because we learn that Pompe was killed by Caesar. The Cobbler said " Rejoice in his triumph. " (I:I:ln33), he means that Pompe is dead and it is time to celebrate. Since Caesar has taken over we know that he is ambitious and will do anything for power.
Act IV: Sc I
In this scene the conspirators plan to kill Caesar. Brutus says " Caesar must bleed; Let's kill him boldly " (II:I:ln171-172). This is the point when the decision to kill Caesar was made, and it was now not a thought but a real plan and action to be taken. This was also the point where all of the conspirators agree or don't do the plan at all.
Act V: Sc V
Scene III is when all of the planning and sneaking around finally goes into affect. This is the scene where Caesar dies. Brutus said " His time of fearing death ". This is when the conspirators work has all payed off. They have completed their mission.
In act IV the ghost of Caesar is important, but Brutus was already going to Phillippi so I don't think that it was that important. I think that the riot was the most important thing because that was the thing that let the reader know that everything was falling apart. Antony said " These many shall then shall die " (IV:I:ln1). This is the way we know that Rome is in chaos.
Act V is the last act in the play. It ends with Octavius saying " Let's away to part the glories of this happy day". When he says this he means the war is finally over, lets go celebrate. This is important because it lets us know that the play is over and the climax was resolved. This is also the last line that was said in the play.
I think that the theme is that actions have consequences. This is the theme because all of the conspirators thought that when Caesar died nothing would happen but the truth is that something will happen. Also Brutus thought that nothing would happen from Antony giving his speech, but the whole town ended up turning on him. Lucilius said "But not with such familiar instances.". He means that the people come not as friends like he thought. Instead they were mad at the decisions that they made.