Hidden Predator

"The Bull Shark is the most aggressive and unpredictable of all the sharks, thought to be responsible for more attacks on people than any other. Last year, the biggest Bull Shark ever recorded was caught in South Africa - in a river. Was this monstrous freshwater catch a horrifying fluke or are there more shark giants prowling this river? Jeremy heads to South Africa to see if he can land a monster freshwater shark of his own. See if last year's catch was a one off or if there are more monsters out there, and discover if the presence of this known man-eater is a human tragedy just waiting to happen."

Synopsis
One year ago, Jeremy Wade was investigating the bull shark in Australia and caught a small pup, proving that the sharks were breeding in the local rivers. Around the same time, a group of scientists in South Africa made a shocking discovery: the largest bull shark ever caught, and it was found in a river.

Now the team is back on business, and they've brought Jeremy with them in hopes of finding out if this was a horrifying fluke, or if the sharks have made the river their homes. Jeremy discovers that the largely populated river is full of sharks, yet nobody has ever been attacked. Wade realizes the reason why these fish are in this river as well as why there have been no attacks, and lands two of his biggest catches yet.