Dexter, "The Damage a Man Can Do": Life almost (but thankfully doesn't) imitate art

Spoilers for last night's "Dexter" coming up just as soon as I get some, uh, treats out of my cereal box...

First thing's first: rarely have I been as horrified by an act of fictional violence as I was by watching Miguel Prado plunge a knife into Billy Fleeter, because I knew it almost wound up not being fictional. When the scene was filmed, Jimmy Smits accidentally grabbed a real knife instead of a prop one and stabbed stuntman/actor Jeff Chase with it, and was lucky that he hit the small plastic plate covering Chase's heart. Even knowing that Chase survived relatively unscathed wasn't enough to prevent some massive cringing as I watched it.

(Also, because this story came out very early in the season, it completely spoiled the fact that Prado would wind up joining Dexter in the plastic-wrapped killing ritual. C'est la vie.)

There are still some major foundational problems here -- the Bay Harbor Butcher issue still hovers over every one of Miguel and Dexter's interactions, Deb is turning into one of those gullible "Heroes" characters who believes whatever story she's been most recently told -- but Michael C. Hall and Smits continue to do wonderful work. Dexter's excitement at finding what he thinks is a true kindred spirit (as opposed to Lila, who was just nuts) and Miguel's excitement at getting to dispense some first-hand justice were so well-played that I almost was able to ignore the fact that Miguel should be smart enough to connect the dots and realize he's dealing with a much scarier individual than even he thinks.

Also, the final scene with Ellen Wolf suggested that there's more to her history with Prado than either has admitted so far. The look on her face didn't say, "God, what is this hypocritical sonuvabitch doing at my front door?" It said, "Is this another booty call?"

And in terms of guesses for our serial killer, I'm assuming it's the head tree-trimmer -- not only because his underling was so terrified of him, but because, unless my eye is way off, he's being played by Jesse Borrego, who isn't quite a Hey, It's That Guy!, but still falls under the Most Recognizable Guest Star theory.

What did everybody else think?