At the magical 48-minute mark, Hodges appears to tell us that the black powder Nicky and Liam found in the back of the van is toner powder associated exclusively with commercial copy machines. Catherine is now illuminated by her own above-the-head light bulb, and she recalls that Katy went to the copy center that Monday. Next to her, Sara continues to stare at her paper with an expression best described as "Hmmm…ten-letter word for extra cast members, starts with an E…"

Sara's gonna have to put down the puzzle soon, because Catherine's hurtling toward the victims' common denominator, powered by the magical velocity of the 48-minute mark. Long story short: all the women had visited the copy shop right before their abduction.

Within seconds, a dozen squad cars have converged on the copy center, and Brass has identified the long-term Xerox jockey Kevin Greer. He's been on the job since 1983. Brass has a talk with the laconic undergrad who's probably just there to satisfy the terms of his financial aid package, and we quickly establish that Kevin just took off, he's not what you'd call popular with the kids, and he uses the handy comb binding machine to assemble his comic books. Catherine finds a cache of black plastic trash bags with a lot of toner on them,

Then everyone teleports to the Kasa De Kevin. As they go through the darkened house, a rhythmic racket makes it hard for anyone to hear themselves think. This is when I expect Brass to turn to someone and snap, "Just once, I'd like a New Age serial killer, so when I go through their empty house, it's all chimes and lit aromatherapy candles. This way, I can hear myself think and see where I'm going." Because, really. The dank little hovels get old.