Dexter

Based on the novels (Darkly Dreaming Dexter, Dearly Devoted Dexter and Dexter in the Dark) by Jeff Lindsay, Dexter is one of the most awesome tv series of today. During the day, Dexter Morgan is a jovial employee in the Miami Metropolitan Police Department's crime lab, but his meticulously crafted life masks his true nature. In reality Dexter is a disciplined and murderous psychopath (a self-admitted "monster"), and he slakes his blood lust at night by carefully killing the serial killers he tracks down during the day.

Michael C. Hall is perfect in this role. The script is fantastic and the soundtrack amazing. Its full of suspense and action with a bit of comedy in some episodes. 

Dexter Early Cuts is a web-based series in the form of an animated comic about the character Dexter Morgan and his earliest kills, thus the name "Early Cuts". The series is narrated by Michael C. Hall. You can find it online.