Series 7, episode 4:
Helen comes face to face with a troop of Western lowland gorillas in the wild rainforests of the Republic of the Congo.
Ken and John have looked after Jubari, the rhino, since he was a young calf. Now old enough now to start a herd of his own, the time has come for the zookeepers to say goodbye to one of their favourites.
And Yvonne gives a helping hand to a sick hedgehog before returning him to the wild.