O good Horatio, I’ll take the ghost’s word for a thousand pound. Didst perceive?
Oh, my crime is so rotten it stinks all the way to heaven. It has the mark of Cain on it, a brother’s murder.
Now might I do it pat. Now he is a-praying...To take him in the purging of his soul when he is fit and seasoned for his passage? No.
How now, a rat? Dead for a ducat, dead! ...A bloody deed? Almost as bad, good mother, As kill a king and marry with his brother.
Oh, what a rash and bloody deed is this!
Hamlet arranges a play which reenacts the crime the ghost told him. Claudius becomes upset and leaves, which Hamlet takes as a confirmation that Claudius murdered Hamlet's father.
Claudius orders Rosencratz and Guildenstern to take Hamlet to England to be banished. He confesses his crime through prayer after they leave. Hamlet debates murdering him.
Hamlet interrogates his mother about her relationship with Claudius and admits that he has been faking madness. He hears someone else in the room and believes it to be Claudius so he draws his sword and kills the person who is actually Polonius.