Warning! This article contains Spoilers for Dexter: Original Sin season 1, episode 1!Dexter Morgan keeping trophies was an important part of his serial killing process in the original series, but Dexter: Original Sin changes the context of when he started taking them – and what he would keep. Throughout Dexter’s original eight seasons, the titular vigilante killer kept trophies in the form of blood slides, which he had easy access to as a blood spatter analyst at Miami Metro Pd. For every person Dexter killed, he would cut their cheek, take a drop of their blood, place it in a slide, and keep them stored in a box hidden behind his AC unit.

By the time Dexter’s original show begins, Dexter Morgan has already been killing for 15 years, so his modus operandi has been well-established. Meanwhile, the younger version of his character in Dexter: Original Sin is just getting started,...