The Winchesters have checked into a disappointingly normal-looking motel room somewhere in town. Sam replays his recording of Arthur's chanting. "Can you actually understand any of the words?" he asks Dean. "If they are words," Dean says. "Sounds like babble to me." He suddenly remembers he bought a translation app for his phone, the very idea of which amuses Sam for some reason. He holds up his phone to catch some of the recording, and then looks at the results. "And... babble wins! Language unknown." He shows the results to Sam. Despite not recognizing the language, the app has done an admirable job of guessing the spelling and placement of punctuation. Sam's phone rings. He answers, "Agent Sambora." He listens for a minute, and then frowns. "What?"
Cut to a hospital room where an unconscious Arthur Swenson lies strapped to a bed, bandages wrapped over his former eye. In the hallway outside, Dean talks to a cute doctor who tells him that Arthur severed his optic nerve. "He was determined to remove the eye," she says. Dean winces. "And he used what to cut with?" "He doesn't look strong enough," she says, "but he broke off part of the bed frame and used it as a knife." Dean asks her about the two different colored eyes. Turns out Arthur got a transplant almost a year ago to the day and it was the transplanted eye he cut out. Dean thinks for a second. "Is it possible to trace the donor of the transplanted organ?" he asks. "Difficult," she answers. "But possible?" he presses. She gives him a flirtatious little smile that says, "I'd pretty much do anything for you and I don't even know you." Dean makes a face like, "Yeahhh, I still got it."
We skip a scene (thank you) where Dean fills Sam in on Arthur Swenson's eye and pick up with Sam revisiting the Paul Hayes case and discovering that he too, had a transplant a year ago. Dean greets evidence of Sam's initiative with a cocked eyebrow of incredulity. Off Dean's look, Sam explains, "You want me on board, I'm on board." Also, thinking that perhaps Dean's app didn't recognize Arthur's babbling because it was from a dead language, he sent an audio file to their old pal Dr. Morrison. Dean's like, "Who?" So Sam explains he was the professor who helped them with the Amazons. Dean still looks like he only vaguely remembers. Listen, it was a terrible episode that we'd all like to forget, but you'd think Dean would have slightly more recall of the time he knocked up a lady and then two days later he had a teenaged daughter who tried to kill him. Did he get hit on the head a lot in Purgatory? Dean exposits that they need to hit the road because the pattern from six months ago predicts the next murder will happen in Boulder, Colorado.