Dark and sinister is the new sexy, thanks to Dexter, which in its second season has proven to be the most successful series Showtime has offered up yet. Remember how much you squirmed in your seat during the season one finale? Believe it or not, the premiere of season two felt like it could have been a season finale--because jaws were on the floor when the credits rolled. For being a supposed sociopath, Dex is pretty broken up about the gruesome events that concluded last season. The one and only person who could possibly understand him is six feet under, and it seems our unlikely hero is losing his homicidal grip. He’s even having a little trouble slicing up a few of his latest victims (from a murderous gang member to a chainsaw-wielding fiend from his past). Enter Lila (Jaime Murray, Hustle), a lady with a sweet British accent and a few dark secrets of her own. She seems to accept Dex for who he really is, and he finds himself feeling relaxed for the first time in his life. In contrast, his relationship with his girlfriend Rita (Julie Benz) has been stretched almost to a breaking point. The problem is, he should be anything but relaxed. Someone picked a poor place to go scuba diving off the Florida coast, and came across an underwater graveyard: Dex’s primo spot for dropping dismembered bodies wrapped in heavy-duty trash bags. Word about the "Bay Harbor Butcher" gets out quick, and the F.B.I. sends the best of the best, Special Agent Frank Lundy (Keith Carradine, Deadwood) to work alongside the police to sniff out Miami’s latest serial killer. This guy is no schlub, and Dex may have met his match. And, yes, Dexter gets to work with Lundy on a daily basis, which provides some wonderfully awkward moments. It certainly doesn’t help that the intuitively paranoid Sergeant Doakes (Erik King, Oz) is hot on Dex’s trail. Season two of Dexter is all about decisions. Lila or Rita? Old code or new code? Run or fight? Right or wrong? Well, one thing’s for sure: When it comes to writing, casting, acting, and production, the makers of this show made all the right decisions. Michael C. Hall is simply superb as the title character. You’ll never find yourself more willing to genuinely root for a serial killer. It’s bloody liberating. --Jordan Thompson