That's later. First, Geek and Edgar are off in their own circuitous discussion about code and thermo-radiological spectrum waves (or something). But in talking to him, Dawson's forgotten key elements of his hardware creations and hyper-relays. Dawson helped design a better railway switching system used all over the world. Hmm, trains seem to be rapidly becoming a central focus of what's going on 'ere.

Meanwhile, a homeless guy finds himself on the receiving end of a body falling on his head. A guy in a long coat falls through the bannister of an outside stairway onto this gormless, homeless guy. Except suddenly homeless guy - helpfully called Patient John Doe just about 50 seconds later - has advanced medical knowledge and talks the talk. An EMT crew turns up in a shitty part of town in record time. Hell, they show up in what would be record time from one wing of the hospital to the other. The homeless guy takes over and in the middle of the fray, figures out how to save a life.

But the soon-to-patient Doe suddenly keels over, exhausted. The guy who he has just healed walks off with no one noticing.

Doe ends up in the hospital and starts telling anyone who'll listen that he is Dr. Allen Rafferty from Johns Hopkins. That's not right. Strike Force Vicodin's Doc Carpenter knows of Dr. Rafferty, who's a neuro-muscular specialist. And homeless guy, you're no Rafferty. Carpenter is seen looking at a drooling Robert Crumb of a character while a psych ward nurse (it could be the missus, though) explains to him Rafferty's precipitous decline from genius to drunk to suicidal sad sack.

From that moment, we go to where Riley gets his eye-popping moment of PJ, not a hard body (hooray) but a regular, work out twice a week bod. And tall. I think I've mentioned that. After he can speak and gets past the request for wine, which coincides with PJ donning a red silk bathrobe, he tells her the only drugs taken in the pharmacy break-in, near where the homeless guy was, were hemoglobin accelerators. This factoid is promptly ignored for the rest of the show.

McBride makes the synapse jump that the three victims are all connected.

The scene changes to Riley being the dumbass, socially inept dork that he is, walking through Shady Back Alley carrying a fancy, expensive-looking tracking device. He hasn't got the pimp walk down and suddenly he's jumped by a group that clearly aren't the Guardian Angels. He's left roughed up and wobbly. Just as suddenly Riley's blurred vision sharpens onto Patient Doe, standing above him in the alley, who mumbles what he thinks are Riley's injuries: fractured baby back ribs and crows' feet.

Riley is able to report into his walkie that talkies that he found the Neuro behind Seventh and Coulter streets. 'Cept when Strike Force Vicodin shows up, he runs from them, having forgotten who they are. His arm had been grabbed as he sat there and his mind is n00bed.