Dexter's on his computer trolling the Cultural Center's website, and soon he's identified Colin Hanks as "Travis Marshall." He then runs his name through police records, but he comes up totally clean -- not even a parking ticket. And if there's any stronger evidence that he's made a deal with the devil, I don't know what it could be. Dexter does get his address right before Mos Def knocks on the door with a six-pack, and his stock just keeps rising in my house. Dexter notes that Harrison is falling asleep, but Mos Def says his timing is great, then, as he pulls out a stuffed animal from inside his jacket and says it's the toy's bedtime too. (It's a lamb, by the way -- not very subtle, but at least consistent.) Dexter thanks him and goes to put Harrison down for the night...

...And then Dexter and Mos Def are hanging out on the terrace. Mos Def supposes it must be tough for Dexter to leave Harrison and go work Homicide every day, and wonders how he got into it. Dexter replies that his dad did it, so he kind of fell into it, but Mos Def astutely points out that that's not really a track you just fall into. Dexter, only slightly warily, admits that he was drawn to the blood work, and when Mos Def asks why, Dexter takes a moment to consider, and then tells Mos Def how he watched his mother get killed in front of him when he was three. He doesn't go on about the part where he sat in blood for days afterward, but it's still clearly a big step for him, and he goes on that in his case, the darkness got in deep -- it never left him, and it never will. Mos Def asks if he can remember anything from before his mother died, and Dexter, perhaps to his own surprise, does recall that she used to wrap him in a quilt and sing songs to him, and that she'd trace her finger along his ear, which made him feel good. Mos Def thinks this is an example of the light Dexter carries within him, and when Dexter demurs, Mos Def tells him that the Bible teaches that there's no darkness the light can't overcome, and even a tiny bit of light is enough to keep it at bay. "Believe me, I know." Mos Def brings up Harrison, and Dexter breaks into a proud, beautiful smile just at the mention of him, which Mos Def says proves his point. "You're sharing that light with him, every day, all the time." Dexter looks, probably for the first time, not just that he wants to believe it but that he's, just a little bit, starting to think it might be true, and Mos Def says it's in him -- he just has to let it out. This conversation hitting him harder than he was prepared for, Dexter leans back and closes his eyes for a moment, and Mos Def brings it down a notch, saying that it's really nice to be there with him. He says they have to do this again sometime, and without too much of a nod to the end of the episode I will say I hope they do, indeed.