I fear we may be losing the plot a bit on Dexter: Original Sin — or maybe I should just speak for myself. It’s not that I’m having trouble following what’s going on, but that I’m genuinely not sure where to devote my attention. Four episodes into the first season, there are obviously two main storylines: Dexter becoming a serial killer in the present, and Harry’s relationship with his doomed CI Laura Moser in the past. There’s so much else happening on the fringes...