Rosen reports his findings from Kern's MRI to the group: Kern, even though he wears glasses, is blind. No optic nerve, you see. Which explains why Nina couldn't Push him, but doesn't explain Cameron's account of how he darted for the door. Rosen figures that Kern's an Alpha (duh), and Gary suddenly interrupts by freaking out that his phone (the one he got from Skylar) is gone. Rachel finds it and hands it over, but Gary's still upset because someone's obviously been snooping in it. Rosen gets things back on track, saying Kern is suspected by DoD of doing some kind of research in some capacity as both a Red Flag member and an obstetrician. They've cleaned out his office, and Rosen asks Gary to do the data mining, which requires a lot of flattery from just about everyone in the group to get him to agree to. And Gary also agrees with the flattery.
In the Alpha cell, Kern suddenly wakes up, handcuffed to the table, and looks around with eyes that seem to be working just fine.
While going through some of Dr. Kern's urine samples, Rachel becomes aware of subtle aural and olfactory clues of a human presence in there with her, which is odd, because there aren't any visual ones to go with them. She wanders out into the hallway, wondering if it's Gary, but he appears just long enough to snap at her for disturbing him before disappearing back into his office. But Rachel's invisible visitor hasn't exactly disappeared. I mean, any more than a person can disappear who is already invisible.
Bill and Rosen walk into the cell with Kern, and Rosen has Bill take the gag off Kern's face, which is when Kern turns out to be played by Brent Spiner. Nice to see him again, even if he does look eighty. He also wants a lawyer, which Rosen politely says is out of the question, seeing as how Kern is being detained by the DoD on suspicion of connection with a terrorist organization. Lawyers are so 20th century. Rosen has Bill uncuff Kern, stand him up, and turn him around so Kern's back is to Rosen, who then suddenly flings his coffee cup at the back of Kern's head. Kern easily dodges it as though he saw it coming, which would be tricky even for most people with functioning eyes. That's enough to confirm Rosen's theory that Kern uses echolocation or sonar to "see" his surroundings. Which we get to see for ourselves as Rosen explains Kern's abilities to him while looking like he's in a POV shot from Daredevil. "This isn't going to end well," is Kern's only response. Maybe not, but if Rosen had been wrong about Kern's ability to dodge that mug, it would have started even worse.