The comic overtones and the terror in Crime and Punishment

Part 3 of F Dostoyevsky's Crime and Punishment (Pevear-Volokhansky tr.) begins, of course, w/ Raskolnikov sick and delirious in his bed and with his best friend, Razhumikhin, trying to put everything aright; for the most part, this consists of seeing to the welfare of R's just-arrived mother and sister (Dunya). In a scene that would be broadly comic in almost any other setting, Raz escorts the two women back to the house - a decrepit and crime-ridden lodging, which R and Raz both note that it shows Dunya's fiance, Luzhin, to be a cheapskate and to not care about the welfare of his to-be family - while assuring them that he will look after R and will get a dr. - their friend in common Z (can't remember his full name) - to look after him and will report back to them after the dr's visit. Throughout the whole walk to the renal apartment Raz talks nonstop, mostly nonsense; by his own admission he is quite drunk. What we see, however, is that he's smitten w/ the beautiful sister, Dunya. But despite the comic overtones and broad strokes, we have to keep in mind the situation and the setting: Late at night, lots of drinking and rowdiness, and R himself almost out of his mind but not with drink or illness - rather because he has murdered two women and he is wracked between concealment and confession. No good can come of any of this.