This chapter introduces the character of Porfiry Petrovitch, who will become Raskolnikov's adversary and actually his friend even though Raskolnikov will not admit the latter.
The essence of the chapter is Razumihkin and Zossimov's discussion of the murder and the arrest of the house painters for the murder. The entire discussion excites Raskolnikov so much that Zossimov thinks that he is almost recovered from his illness. Razumihkin's strong defense of the painters becomes ironic when later, in Part Four, Nikolai, one of the painters, confesses to the crime (albeit a false confession).
The long and difficult explanation of the crime — a discussion that involves many new names and theories of guilt that later prove false — must be viewed as some sort of filler for the newspaper in which the novel was being serialized.
