As promised, the second season of Dexter ended with an explosive finale. Not to put too fine a point on it, but that’s actually how the final episode began. From the moment Doakes discovered Dexter was the Bay City Butcher, the plotline took an even more ominous tone than the rest of the season had already established. What followed was a collision course among the characters, from which no single victor would emerge unscathed.

Before I go any further, here’s the obligatory SPOILER ALERT. Even though it’s been over a week since the finale premiered on Showtime, what follows reveals key details to the finale’s outcome.

From the outset, the second season of Dexter traveled a darker path than its predecessor. Once treasure-hunting divers inadvertently stumbled upon his underwater dumping ground in episode one, the series shifted from playful mayhem to an almost surreal tragic epic as told from the killer’s desperate perspective. The supporting characters' roles, from Doakes’ dogged pursuit of Dexter, to Lila’s demented devotion to him, to Deb’s quest for love, to Rita’s torn loyalties — all served to advance the notion that Dexter is the dark personage that lives in our universal heart.

The genius of Dexter lies in its unerring ability to force us to drop our disguises. Even though the series largely plays it with a wink and a nod, it conceptualizes our primordial desire for justice. More importantly, it recognizes the more important need for survival. And that’s really what this season was all about: Dexter coming to grips with that dichotomy. The first rule of Harry’s Code was to not get caught while meting out vigilante retribution, and it became Dexter’s mantra once the task force began closing in on the Bay Harbor Butcher. The problem with that strategy was that it found him in a crisis of conscience through most of the season, grappling with his own motives while covering his tracks.

In the end, Doakes and Lila serve as the links to Dexter’s past and his path to the future. Locked in a cage while Dexter decides to deal with the man who has happened upon the truth about him, Doakes eventually becomes Dexter’s confessor. He almost convinces Dexter to turn himself in, until Dexter experiences an epiphany while having dinner with Deb. The dinner’s cut short when Deb receives a phone call that the task force is closing in on Doakes’s location. Dexter races back to the remote cabin where Doakes is held prisoner, realizing he must release Doakes before the Feds find him, lest his plan to frame Doakes for the killings goes seriously awry.