It's time for a meeting about the case, but Anderson has no sooner started talking than Masuka enters and interrupts to inform them that there were traces of rust in the kill wound, and I hate to interrupt for a nitpick (ha ha, I kill myself sometimes), but are we meant to believe that ME didn't run a similar analysis on the first victim's wound? Or are we saying that the rust on the weapon only formed between the two kills? It's just an annoying point, because you can see the writers straining to shape the way the case develops, and it makes it feel -- oh god, here we go again -- less organic. Anyway, the significance of this point is that weapons haven't been made from iron for some hundreds of years, so it narrows down what they're looking for to something very old, such as a sword, and Deb encourages him to stay on that track before Anderson goes on that the killer has left them three "tableaus," which gets Quinn's anti-intellectual back up, and he makes himself look like even more of an idiot than usual. Not that any of his moronic posturing fazes Anderson in the slightest, and Dexter pipes up that the use of the word "tableau" is apt here, given that everything in the crime scenes has had significance, and I'll go with that conclusion but I still think it's rich coming from someone who apparently NEVER HEARD OF THE FOUR HORSEMEN BEFORE. Dexter adds that "Mike" is just helping them interpret the killer's language, and it's funny that he's playing Quinn Whisperer here, so Anderson goes on that they know about the Four Horsemen (he doesn't add, "Thanks to me,") but he's also found a reference in Revelations to a seven-headed snake rising out of the water. I guess Colin Hanks did the best he could with that one. Deb asks about the intestines, and Anderson, in a hilarious deadpan, says there's no passage on intestines, but given that the scales of justice are all over the Bible, he figures it's a reference to God's judgment of mankind. No one has anything to say about the numbers until Dexter notes that the kills happened five days apart, which is the same differential as between 1237 and 1242. Batista speculates that the killer is counting up to doomsday, so Deb tells her team to round up any religious nuts with criminal records. "Let's find this... Doomsday Killer." That's a moniker that will calm the people down!