The wallaby team are faced with a life-and-death decision when mum Zero is clearly too ill to care for her tiny joey. But can this extremely fragile newborn survive? The carnivore team need their pair of European wolves to breed, but how do you get wolves in the mood for love? And can the cameras capture them mating and give the keepers the reassurance they need that the wolves are a successful match? Anne the elephant makes friends with some notoriously greedy grazers. Jean Johansson welcomes a new enormous European elk to the park, but can they convince her to step off the truck? And Kate finds out which aquatic animal is the fussiest on the park.