Predators and Prey in Being Human

I like that Being Human keeps playing with stereotypes for werewolves, ghosts (well, now re-animated corpses), and vampires. Sometimes the usually-accepted supernatural rules apply to Josh, Sally, and Aidan, but sometimes the writers flip those rules upside down. "Of Mice and Wolfmen" (3.09) is a great example of this rule playing.

Spoilers for the episode below.

Josh

The main reason Josh doesn't want to be a werewolf is because he is afraid he will hurt someone. That was true the first time around, and it's true again this season. He constantly worries about what he might do, and he copes by coming up with ways to distract the wolf (chicken on a rope) or contain the wolf (the storage cell). In this episode, Pete shows up and shows Josh how to connect with his wolf through meditation. It isn't a way to control the wolf and it's certainly not a cure, but Pete seems at peace with his situation. So Josh adds meditation to his coping mechanisms. Wolves are natural predators, but Josh doesn't want to hurt anyone, and it seems like neither does Pete. Pete goes against his (supernatural) nature by accepting that he is a werewolf and not using his condition violently, and Josh is working towards that same acceptance.

Sally

Sally figures out that she can eat live creatures to restore her body. She freaks out, but Nick rationalizes it: normal people eat meat all the time. But Sally sees it quickly escalating to consuming people, not just animals, and she decides her survival isn't worth killing people. She chooses to constantly fight her hunger. The predator-prey relationship falls apart, and it's progress for Sally's character too. Last season, she shredded ghosts when she thought it meant her survival, but now we see that Sally would rather die than hurt people.

Aidan

Aidan recovers from the flu virus, and the group realizes that it's because he drank werewolf blood. Werewolf blood acts as a vaccine for vampires, and Aidan knows that werewolves would be in danger if other vampires found out. But Aidan tells Blake about it anyway. Aidan the Friend says that Nora and Josh are off limits, but Aidan the Vampire is tired of weakened vampires running away from werewolves. He revives the predator-prey relationship between vampires and werewolves.

Josh and Sally go against their predator natures, but Aidan doesn't. In the larger picture, vampires usually hunt werewolves, but when the flu virus killed most vampires, roles switched. Werewolves hunted down and killed the weakened vampires. Aidan's discovery about werewolf blood switched the roles back: now vampires hunt werewolves again, but this time for blood.