The world's oceans are a deep source of unsolved mysteries - from ships that disappear without a trace to unexplained underwater anomalies to a super virus showing up along Florida's coast. In Mysteries of the Deep host Jeremy Wade searches for answers behind the world's most iconic and baffling underwater mysteries known to science. The deep-sea remains a dangerous and unexplored frontier - a place that swallows evidence and where the unknown is normal. Jeremy takes on his biggest adventures yet and will stop at nothing to find answers.