After the ads, the rest of the team has arrived and is looking around with varying degrees of usefulness. Rosen shows Sullivan the rook, and she's pissed that Marcus thinks it's a game, vowing that it'll only end with Marcus dead. Fun game. Cameron, meanwhile, looks to be reconstructing the murder. Following the cable down from Singh to a crashed car to the overturned luggage cart, he finds a bent quarter jammed in one of the cart's wheels. He shows it to the rest of the team and nervously explains how he was able to mentally reverse-engineer the crime. "Similar, but not the same," Rosen reminds him, but Rachel's micro-exam of the coin comes up clean. And Nina comes back empty-handed from her canvassing of useless witnesses. Their only lead is the rook Marcus left. "Assuming Singh was the rook, who do you think is the black king?" Bill wonders. Probably not you, big guy.
Rachel has found some pollen on the rook. Back at the lab, she's narrowed it down to the pollen from a stargazer lily. She relays this to Bill, who asks Gary to start searching for them. "I'm not Google guy," Gary protests, but Bill just wants him to scan security cameras around Manhattan for the flowers. Gary gets right to it, Minority Reporting those images that only he (and the folks watching at home) can see.
Rosen, meanwhile, is again flashing back to six years ago. Handing that charred coin to Marcus, he asks what happened. Marcus claims it was an accidental gas main explosion, which Rosen doesn't buy, especially since Marcus doesn't believe in accidents. Apparently Marcus's roommates are in the hospital after the fire. Marcus downplays it, saying, 'Nobody was going to die. Unless I wanted them to." I can only assume Marcus meant to give that away. Suddenly he comes over all headache-y, and Rosen says that he's sending Marcus somewhere else. In walk Cley and a couple of other agents in bulletproof vests. End of flashback. Bill's standing outside Rosen's office, and starts lecturing him about not getting sentimental. Rosen is filled with regrets over his past handling of Marcus, but Bill insists that he hears this stuff all the time form parents and teachers of kids who go wrong. "The fact of the matter is, Marcus was probably born broken." Rosen refuses to believe that: "Life just encourages." He says he even helped Marcus develop his abilities, which was a pretty smooth move. "Now we're gonna stop him," Bill says. Enter Gary, pissy at Bill about how his search parameters weren't specific enough. He narrowed it down to a Federal building. He tries to open Rosen's computer (which he can't do without help, which is a nice touch -- after all, why would he ever need a computer?) and explains that Cley's team is working out of that building.