In Rosen's office, she tells him that Marcus blames Rosen for having him locked up, so maybe he broke out to come after Rosen. Rosen says that Marcus left him messages, and would have killed him by now if he wanted to. She says he still has a conflict of interest, and he gets pretty pissy about that. But actually he's just pissy about Cley assigning his group field work, which is totally not what he'd planned to do with his group. Anyway, with that established, it's time to get to it.
Conference room. Rosen fills his Alphas in on Marcus's power over cause and effect . He warns against taking any unnecessary risks when dealing with him, which leads Gary to go off on a digression about which risks are necessary and which aren't. Fortunately, Gary is also leaving the room, along with almost everyone else. Now that it's just Rosen and Nina, she asks why he didn't tell her Marcus was out, indicating that there's some emotional history between Nina and Marcus as well, not that we'll find out much about that tonight. Now Nina's bringing up the question of whether she'll be sent to the compound one day, alluding to some shit she made her boyfriend do. So in addition to having super-bossiness, Nina also has the ability to bring up backstory that doesn't get explained.
Cameron is watching a video of Marcus throwing a coin off-screen to demonstrate cause, and coming up with a letter opener to demonstrate effect. Cameron pauses the video as Rosen comes in to explain that since Marcus thinks everyone has the same control over events that he does, his assumption that everything that goes wrong in his life (and apparently such things are legion) is on purpose has driven him into a state of paranoia. Rosen adds offhandedly that Cameron's brain is anatomically similar. I was wondering whether somebody was going to bring up the likeness between Marcus's powers and Cameron's. They even have somewhat similar faces. But the difference, as Rosen points out, is that Marcus blames everyone else for his problems, while Cameron blames only himself. Cameron thinks maybe Marcus does the same thing. Rosen looks startled at Cameron's insight. Or he's just making a dramatic end-of-scene face.
Rachel is micro-examining the quarter Marcus left, and Rosen guesses that she found some ash in the grooves. She wonders how he knew. "Past failures," Rosen says on his way out. I hope he doesn't share Nina's secondary superpower.
We next see Rosen outside a brownstone apartment building, flashing back to what a subtitle tells us is six years earlier. He walks up to that same building, which is burnt out and empty, with fire engines still around it. Looking around, he finds a charred quarter on the sidewalk and picks it up. Then he's suddenly brought back to the present when none other than Marcus himself calls his name and walks right up to hi. "What took you so long?" Marcus asks. Just be glad it's not another ninety-minute episode, Marcus.