This is a show that I got hooked on about a year ago and I only finished it recently. I feel that it is critically under-rated. Too few people have seen this. I think it may have suffered from Arrested Development Syndrome: it was just too smart for a lot of people. Which is really frustrating because there were a few story lines that they started that were incredibly interesting and if they had had more than 2 seasons they would have been really interesting but they didn't so we'll never know (unless the show gets renewed which I doubt but it would make my day). It is an amazing show.
The Narrator: The Narrator is an omniscient narrator of the show. Pretty self explanatory. He is a voice-over narrator as opposed to a physical one. Whenever the murderer and the motive is revealed, he always says "the facts were these." He is often the verbal communication of a character's feelings.
Plot: The plot structure of the show is pretty much the same: Emerson gets a visit from someone who needs help solving a murder, Emerson, Chuck, and Ned go to the morgue and interrogate the corpse for 60 seconds. They question several people involved and they eventually solve the case. There is also usually some back story to one or more of the characters.
I really like this show a lot and I am sad that it was cancelled after just two seasons. There are only 22 total episodes. The depressing part is that they seemed to be touching on some storylines that looked incredibly promising but since the show was cancelled they didn't do anything more. it seemed like a sudden cancellation too. But the 22 episodes that do exist are excellent. I personally would vote for it to be reinstated. I highly suggest this show to people. You can find the episodes on Netflix if you want. Check it out!