Invisible Executioner (S04E03)

While everyone knows that crocodiles and hippos are fierce hunters in the waters of Zambia, there's another terrifying creature lurking in the perilous Zambezi River. Locals refer to this river beast as "the Mazunda," but it's a name Jeremy Wade has never heard before. Determined to discover the truth, will he unveil the identity of this menacing entity rumored to be capable of swallowing a child whole?