I still cannot fathom what they where on when they wrote this.
Why kill Deb?...she deserved the happy ending, the story didn't need for her to die, it only served for Dex's absolutely pathetic and terrible "realisation" that the ones he hurts the most, are the ones he's closest too, gee..REALLY DEX...****ING REALLY?..when your wife was brutally murdered and your son left in a pool of her blood, ya didn't have any kind of ****ing notion that this was how things where going to be.
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Producers and writers show be publically shot fot that entire season, it was already sliding down hill and destroying every character in it, but that ending...dear god.