The second episode of Season 6 of Showtime's Dexter was televised Sunday night at 9 ET. An hour later, on AMC, Breaking Bad concluded Season 4. And so far as I'm concerned, the two outstanding, unusual drama series share more than an evening's proximity. When they do finally wrap up their daringly dark story lines, I predict they'll end the same way. They'll end, I suspect, with loving relatives learning about their misdeeds, and squaring off against them in a raw, potentially fatal confrontation, fueled by disbelief, anger and betrayal...