Narration & Cliché in "Crime SuspenStories

One of the most entertaining aspects of "Crime SuspenStories" arises from the dynamic narration, eminent throughout the entire series. Depending on the format of the story, the narrator fills various roles, some of which are listed below:
 an anonymous objective narrator
 an assistant defense attorney in the protagonist's trial
 a witch, who is the reader's "hostess in horror"
 the protagonist's conscience
 the protagonist.
Especially in some of the earlier stories, the narrative voice introduces the story in a passage, which reveals the ending as well. This in particular caught my attention, as it seemed too literal to be incorporated into a suspense story. How is it that comic writer's were able to achieve suspense despite giving away the ending at the beginning? Furthermore, why would EC choose to include this aspect in the first place? As I continued to read, the narrator's role in Conniver! also caught my attention. In this particular story, the narrative voice is that which exists inside the protagonist's, Tom Brogan's, head. The narrator pesters Tom about his lowly office position every time he sits at his dilapidated desk and furthermore, develops the plan according to which Tom hopes to murder Mr. Gaynor. In this case, the narrator greatly augments the psychological depth of the comics. Although the narrator does not serve as an internal voice throughout all of the stories, the psychologically thrilling aspect permeating the volume, was in my opinion, surprising. By incorporating psychological depth, the stories alluded to the universality of madness and were therefore even more suspenseful. The subjects of the comics were diverse (i.e. artists, writers, businessmen, engineers, business agents, assistant editors, doctors, etcetera) and for this reason, the stories were written as if they could happen to anybody. This combined with the psychological nature of the stories, juxtaposed the clichés, ubiquitous in plot and character content, thus surprising the readers despite otherwise expected circumstances.