Earlier in the season, I found myself getting frustrated about the pacing of Season 6 of 'Dexter,' but 'Angel of Death' was the kind of stellar, fast-paced episode that Dexter can deliver when it's clicking on all cylinders. It covered a lot of ground and didn't waste any time. Dexter stacked clues in pursuit of Professor Gellar, but -- as has often happened to our morally ambiguous anti-hero -- lost someone close to him in the process.

As per usual, Dexter's off-the-books investigations found him several steps ahead of his colleagues in Miami Metro, the ones conducting the legitimate, lawful detective work. Dexter tracked Travis from outside the greenhouse crime-scene, connected dots from glue used in one of the horse's sheets and tracked him from there. He eventually staked out his car, ambushed him with the "wire around the neck from the backseat" trick, but concluded he was only a pawn in Gellar's game and kept him alive to get closer to the twisted Professor.