During a fictional series of Big Brother, a zombie outbreak occurs, but the house-mates are unaware of the impending doom outside of the Big Brother House.During a fictional series of Big Brother, a zombie outbreak occurs, but the house-mates are unaware of the impending doom outside of the Big Brother House.During a fictional series of Big Brother, a zombie outbreak occurs, but the house-mates are unaware of the impending doom outside of the Big Brother House.