In both the episode and your fic, I loved the portrayal of Henrickson as a smart, informed hunter. Just not the same kind as the Winchesters. I suspect that Fellowes saw Sam as a sulky teenager (with Dean making him zip up his jacket to cover the Martin Luther King Jr. t-shirt he wore on purpose), but at least that gives Henrickson a spot of weakness. I love that John could happily overlook anything that people like Fellowes were doing in order to what's *really* important to him, without spilling a single details about what he's doing. Smart genfic rules!