OK, there's something about watching the psychopaths all sleepy and cuddling that's just SO much wrong. They're deranged killers, I should not be thinking how sweet they are!

Also, psycho-Carson is disturbing as FUCK. Probably because actual-Carson's medical ethics are already a bit dubious, so it's a little too easy to imagine exactly how far he'd go if he didn't have any at all. But also, just the way you've presented him, barely seen and always with Cadman, touching him and keeping him in line, makes him come across as the creepiest of the bunch.