Jeremy travels to the scene of an ocean aircraft crash in Australia that left a group of Aboriginal elders brutally murdered almost without a trace. He embarks on one of his toughest investigations ever, taking on some of the deadliest animals on the planet in order to track down this elusive killer.

The episode was rated 7.59 from 251 votes.

Jeremy goes to Fiji to investigate reports of people being attacked underwater and tries to find out if there are multiple culprits or if a single perpetrator is to blame.

The episode was rated 7.56 from 104 votes.

Jeremy Wade travels to Brazil's "wild west" in search of a river monster that has killed three cowboys. The search for the culprit sends him deep into prospecting cattle country, where he discovers the shocking truth about a fish he's never caught before. He has to combat all his fears to catch this monster, and after a long chase, Jeremy finally corners his elusive prey in the most unexpected place. All he has to do then is catch it without getting killed.

The episode was rated 7.55 from 44 votes.

Jeremy is on the shores of the Mekong River in Cambodia to look for a monstrous fish that has blinded, killed and recently sliced clean through a man's testicle.

The episode was rated 7.54 from 92 votes.

Recent reports of fishermen vanishing without a trace on Alaska's south coast leads Jeremy to America's Last Frontier on a mission that takes him on the hunt for one fish he's never hooked before -- the mighty king salmon. When the investigation takes an unexpected turn, Jeremy finds himself in shark-infested waters, observing the salmon shark! Jeremy makes himself shark bait to prove that these fish won't attack a human - even if that human is diving right into the middle of their feeding frenzy.

The episode was rated 7.51 from 127 votes.

Jeremy Wade returns to Africa's Okavango Delta to investigate a pack-hunting carnivore blamed for mauling the victims of a capsized boat. This time, Jeremy decides to put on his dive gear and offer himself as live bait in croc-infested waters.

The episode was rated 7.50 from 107 votes.

Wade calls on the same instincts he uses to catch living monsters to uncover the most deadly underwater giants of all time. He must read the water (and in some cases the land) for clues in order to bring long-forgotten beasts to light. Using Wade's keen understanding of modern-day monsters, top scientific discoveries and state-of-the-art CGI, the apex killers of the prehistoric era such as the 25-foot, buzz saw-toothed Helicoprion and the bone-crushing Dunkleosteus, come to life as ancient monsters are featured on River Monsters for the first time.

The episode was rated 7.49 from 115 votes.

Reports of an attack on a swimmer in a lake close to Berlin is the starting point for an intense and shocking investigation. Wade travels to Germany where he meets modern-day victims of a beast that has been raising its snout above the surface of fresh waters in Europe regularly over the past 700 years. Investigations travel to Spain where Wade discovers firsthand that the wels catfish is a living, breathing aggressive predator growing to man-eating proportions capable of everything depicted in medieval records and more.

The episode was rated 7.49 from 74 votes.

Jeremy Wade returns to Australia's croc-infested Fitzroy River for one of his toughest quests yet — to catch one of the world's rarest fish. This shark is so elusive it was only discovered ten years ago, and so rare only a handful of people have ever seen it. Almost nothing is known about this endangered beast. Could it be a man-eater? The expedition turns Wade's knowledge of freshwater killers upside down as these animals seem to break all the rules.

The episode was rated 7.42 from 66 votes.

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 Wade heads to South Africa to see if he can land a monster!

The episode was rated 7.38 from 52 votes.