Previously: Dexter declined to kill Trinity so as to better learn family values from him. Miami Metro actually got a pretty decent jump on the Trinity investigation, discovering that he's been spreading the ashes of a relative at the crime scenes. Angel and LaGuerta promised their relationship was kaput. And Deb got approval to investigate the bludgeoning third of Trinity's murders. Oh, and Dexter killed a smarmy fashion photog who ended up NOT being guilty of killing his models. Oops.
So Dexter's in his Blood Shack, his voice-over is going overboard with an endless string of defensive, bitchy justifications for why killing Farrow was so totally not his fault. You know my rule with DVO -- I ignore until it gives me something good. Basically, Dexter's feeling guilty -- not only for killing Farrow but for not going after Trinity instead -- and he doesn't like feeling guilty. He even breaks Farrow's blood slide in half, since it doesn't meet the standards of Harry's code. Of course, he cuts his thumb in the process, the better to be a metaphor for his guilt.
At work, Angel presents Farrow as a former suspect, now a possible victim. LaGuerta leaps to the logical conclusion that it was Brand -- Farrow's assistant and the real model-murderer -- who did it, and the case is then passed off to two detectives who don't even get speaking parts, so let's consider this matter shelved for the week, huh?
Deb notices Dexter being extra fidgety, but she has no time to wonder why, as now it's her time to present her bludgeoning case. She's got a slideshow of the victims throughout the ages. In particular, she points out the smudges of cremains that show up in the crime scene photos -- the same as the ash found at the most recent bludgeoning. Alas, because this is Deb, she clicks one slide too far and reveals a shot of one of the bathtub victims, also with an ash smudge in the photo. LaGuerta has her shutter back to it. Deb tries to tapdance around the issue but Maria finally has her come out with it. So Deb explains that the ash has shown up in photos from the bathtub killings AND the jumper-suicides. That's the pattern, see; three in succession, every year or so, for the last thirty years. While DVO repeatedly hopes for his sister's case to get laughed out of the room, LaGuerta is officially intrigued. Even when Deb gets to the part about Lundy investigating him, and how Trinity killed Lundy and shot Deb.