TV commentary:
NCIS- Heh, I'm glad they're addressing this!
I mean, since they killed Reeves as part of Abby's big send off, it seemed like a raw deal. Honestly, I thought the sunglasses would reveal some heretofore unknown thing from Nick's past. I didn't even consider it could be from Reeves. So its good they're showing the gang actually affected by his death.
Criminal Minds- Heh, why are all these people obsessed with Reid?!
So it turns out this whole cult of killers thing is tied back to that ep way back when when Emily and Reid got captured by that cult headed by Luke Perry. Apparently Reid made an impression on the survivors. Hilariously, they showed flashbacks from the ep, but spliced in images of Karen David and Col Tigh like they were there the whole time.
So they followed him this whole time, because they wanted him to be the 300th victim for their end game of reconstituting their cult. Heh, what would they have done if Kat and Lindsey succeeded with their plan for revenge?! Its just kinda funny that Reid had two separate groups of psychopaths stalking him and wanting revenge!