Killer Instincts:  Michael Raymond James of True Blood

Love or hate the vampire stylings of Bon Temps, we give True Blood credit for well-misdirecting the reveal of Rene Lenier as the murderer behind all the vampire-related strangulations of season one, and appreciate the brief cameos the actor makes in subsequent seasons with Arlene's baby on the way.  Man, I wish I didn't know this.