This episode was a strong one (as it buzzed out the gate)...
It's a pity we don't find out WHERE the get they get the secret sauce that caused the reanimation. No matter. I haven't seen a story quite like this before (nice). If I understand it, the human test subjects were necessary to ensure that the revitalized pollinator vector didn't kill off the humans population. Were the reanimated bees more aggressive than their predecessors? The human trials were for some kind of vaccine or antidote for humans stung by the un-dead bees. Headless bees cruising around?! Really?! That's twisted, eh.
I'm a big fan of pollinators... even the ones that are not all fuzzy and cute. Houseflies UNITE... the skunk cabbages of the world need you!