Dexter is my all time favorite. My husband got me a Dexter calendar a few years back and I had the December picture framed and put in my study. Prior to that series I never would watch anything bloody on TV. Boy have I changed!

Thanks for the Luther recommendation. I have been watching 'Blacklist" on Netflix lately. It is fast paced, a little improbably but watchable if you like crime drama. If you like serial killer ones "The Fall" and "The Killing" are good.