S2, E1: Jeremy Wade journeys up the infamous Congo River in Central Africa in search of the notorious Goliath Tiger Fish - a terrifying beast that preys on the unsuspecting. This creature combines the strength, speed and ferocity of all the river monsters Jeremy has ever encountered, creating the most horrific yet perfect freshwater killing machine anywhere in the world. With some of the biggest teeth of any freshwater fish, its ferocity is the stuff of nightmares. This mysterious monster predator pushes Jeremy to his physical and mental limit. It is going to take all of his skills and some supernatural help from the local witch doctor to catch one.