Chuck trails Busgang to an office building and manages to con his way inside with his Nerd Herd badge. I'd suggest the security guy at the desk be fired, but then Not Nestor and Baldy show up and shoot him dead. Saves him from trying to find another job in this economy, I guess. Meanwhile, Chuck has gone (very slowly) up to "Constellation Science" on the second floor to find Busgang. It's all appropriately science-y looking in there, with brain scans and diagrams. Busgang is getting a fairly small amount of money out of a safe. Chuck tries to sneak up on him, but is awed by all the science and Busgang gets behind him with a gun. He's all, "You're the guy who shot me!" Chuck explains it was an accident and introduces himself. He just wants to know about the Intersect. Busgang is suspicious until he notices Chuck flashing on a nearby folder that says "Orion" on it, and recognizes what's going on. He's awed by the possibility of a human Intersect. Chuck is less than awed and just wants it out. Busbang says only Orion knows for sure if it can be done, because he drove the research.
So of course, Not Nestor and Baldy show up just before Busgang can reveal Orion's identity. Sarah, Bond, and Casey show up a moment later, shooting Baldy in the stairwell. Not Nestor then shoots Busgang dead. Bond jumps him and gets shot, as well. Again. He's about to get shot a third time when Bond says "Sweep the leg," and Chuck uses his cast-covered leg to kick Not Nestor and hits him with a cane, for good measure. The gun flies from Not Nestor's hands, but he picks it up again and aims. Sarah shoots him and he goes down.
Castle: Beckman congratulates the team, because capturing Fulcrum's research will slow down their own Intersect program. Chuck wants to know who Orion is, but Beckman says they have no leads. Chuck looks crestfallen. Beckman says Bond is headed back to the UK, but not before confessing to Casey that it was 12 Fulcrum guys he took out, not nine. Casey is duly impressed. Bond says to Chuck: "You're truly the most... special... agent I've ever worked with." It actually sounds kind of nice the way he says it. He also says to never take "no" for an answer, and to start carrying a gun. Amen.