Very cool episode and one that looks to be the start of a longer story arc involving a Serial Killer who knows about Detective Britten's little dilemma about being awake/dreaming. With him on the loose, I wonder how he will be able to utilize this to his advantage to neutralize Britten's attempt to find him. I like the character of Santoro (Megan Dodds), but it's unclear if she will play a bigger role in the series since she's landed in the hospital. My guess is that she will given that she has been tracking the killer for 12 years.