To be or not be/ That is the question:/Whether 'tis Nobler in the mind to suffer/ The Slings and Arrows of outrageous Fortune/ Or to take Arms against a Sea of troubles,/ And by opposing, end them?
In Act 2, the plot stops while actors put on a play (and it repeatedly stops as unexpected events unfold). And in Act 5 Laertes provides a uniquely grieving character that helps Hamlet let go of his guilt.