Bitten wastes no time getting to the nitty gritty in “Rabbit Hole” when Elena (Laura Vandervoort) and Savannah (Kiara Glasco) face greater dangers in Aleister’s (Sean Rogerson) remote compound. And, while at Stonehaven, Nick (Steve Lund) and Paige (Tommie Amber Pirie) embark on a journey that ends with some surprising revelations.