I'm Valerie Taylor and I've been trying to get sharks to bite me. Saturday night in Susanna Karr's Land Down Under. Join two of the world's foremost underwater photographers, Ron and Valerie Taylor, when they take on one of man's most feared enemies, the killer shark, and offer themselves as human bait. Only modern technology separates the killer's jaws from the diver's fragile bodies. A death-defying adventure in Susanna Karr's Land Down Under. 6.30 Saturday on 7.