Episode Title Original air date Unhooked air date
1 "Piranha" 5 April 2009 5 May 2010
Jeremy Wade journeys to the heart of Brazil, following reports in which a bus crashes into the Amazon river, and all the passengers are eaten by a pack of red-bellied piranhas. He investigates this and other stories in order to determine if the piranha really deserve its reputation and what exactly triggers a feeding frenzy. During his trip to remote regions of the Amazon river basin, he finds out that the bloodthirsty piranha is just as predator as prey. Finally he hears a chilling story about a child fallen into the river and after a few seconds, only the skeleton were found. He finally uncovers the truth that piranhas really can be dangerous to humans, but usually in the dry season when other food is scarce.
Featured animals：
Red-bellied piranha（纳氏臀点脂鲤） (Pygocentrus nattereri)
Amazon river dolphin（亚河豚） (Inia geoffrensis)
Black-tailed payara（巨水狼脂鲤） (Hydrolycus armatus)
Ripsaw catfish（黑体尖陶乐鲶） (Oxydoras niger)
Redeye piranha （ 菱锯脂鲤）(Serrasalmus rhombeus)

2 "Killer Catfish" 12 April 2009 23 May 2010
Jeremy arrives at the Kali River in India, where a number of mysterious drownings have occurred. He investigates the possibilities of the culprit being whirlpools or crocodiles, but determines neither fit. Wade eventually finds out of a little-known catfish species that can grow to human size or bigger, the goonch, also known as the giant devil catfish. He reasons that, since funeral pyres are done at the shore of the river, the fish feed off the burnt human remains. This would allow them to reach man-eating size, as well as giving them a taste of people. Jeremy then must face off against a large goonch, which may prove there are monsters of these species ready to eat people. When going after this fish Jeremy spends weeks trying to catch it, but the time eventually came when he had to take a risk and catch this elusive fish. This was the first ever episode of River Monsters to be made, but it only became a "Bonus episode" on the Region 1 DVDs and never released in the UK. Probably this is because the idea of making a whole series on monstrous fish came after shooting this episode (as explained in the 2014 special "Killer Mysteries").
Featured animals
Goonch catfish, （巨魾）(Bagarius yarrelli)
Indian narrow-headed softshell turtle （印度小头鳖）(Chitra indica)
Golden mahseer（黄鳍结鱼） (Tor putitora
)Mugger crocodile（泽鳄） (Crocodylus palustris)
Gharial （恒河鳄）(Gavialis gangeticus)
South Asian river dolphin（恒河豚） (Platanista gangetica
)Indian flapshell turtle （缘板鳖）(Lissemys punctata)

3 "Alligator Gar" 19 April 2009 9 May 2010
Jeremy travels to the Trinity River in Texas, USA to discover the truth behind the alligator gar, a massive predator blamed for horrifying attacks on people. Reports claim this fish is more dangerous than a man-eating shark. With huge jaws and two rows of needle-sharp teeth, the gar proves an elusive opponent. Throughout the years this fish was in the centre of humanity's misunderstanding. Large populations were killed by electric gar destroyers all around the country, bringing this huge animal into the near extinction. Bowfishermen also kill this fish with spears (leaving the fish to die in painful ways as seen in some internet videos), but Jeremy wants to catch one gar alive and release it back safely. Finally hooking a large gar, Jeremy finds out once and for all if the alligator gar deserves its reputation as a river monster.
Featured animals
Alligator gar（鳄雀鳝） (Atractosteus spatula)
American alligator （密西西比鳄）(Alligator mississippiensis)
Smallmouth buffalo （小口胭脂鱼）(Ictiobus bubalus)
Spiny softshell turtle （湾岸刺鳖）(Apalone spinifera)

4 "European Maneater" 26 April 2009 26 May 2010
The wels catfish is one of the largest catfish in the world. Medieval reports claim it is an aggressive man eater that will swallow people whole, even small children were found in one's stomach according a legend. After new reports surface of attacks in Berlin, Germany, Jeremy Wade dives deep into the mystery of these fish. He finds out that these giants attack when they are protecting their nests in the breeding season. His investigation later leads him to Spain, where a group of catfish were introduced into the warm watered Rio Ebro. Numerous factors led to these creatures taking over the ecosystem and possibly growing to man-eating size, for example because of the fishermen's 'catch and release' policy. There, Jeremy finds that these river monsters have no fear of man, and faces a potential maneater.
Featured animals
Wels catfish （欧鲶）(Silurus glanis)
European zander（白吻梭鲈） (Sander lucioperca)
Egyptian vulture （埃及兀鹫）(Neophron percnopterus)
Griffon vulture （西域兀鹫）(Gyps fulvus)

6"Amazon Flesh Eaters"10 May 20092 May 2010
Following a report of a fisherman swallowed whole, Jeremy travels to South America in search of the Amazon's largest catfish, the piraíba. Arriving there, Wade not only tries to catch this monster, but discovers that it belongs to a whole family of Amazonian killers. He catches as many catfish species as he can to prove that these whiskered predators really are the ultimate monsters of this place. His mission is to try and catch the three largest catfishes until he encounters with the smallest ones. He finds the candiru, a tiny blood-sucking catfish that has entered a man's body in the most horrifying of places, and the candiru-acú, a catfish that swarms around and drills holes in dead or dying animals, including humans, eating them from the inside out and leaving only the skin and bones. Discovering the horrifying deeds of these fish only pushes him even further, until he faces off with the giant head of the murderous catfish family, 'the mother of all catfishes', the piraíba.
Featured animals
Piraíba （丝条短平口鲶）(Brachyplatystoma filamentosum)
Redtail catfish （红尾护头鲿）(Phractocephalus hemioliopterus)
Gilded catfish （祖鲁油鲶）(Zungaro zungaro)
Candirú（寄生鲶） (Vandellia cirrhosa)
Candirú-Acú （半鲸鲶）(Cetopsis candiru)
Black-tailed payara （巨水狼脂鲤）(Hydrolycus armatus)
Mexican burrowing caecilian （墨西哥蚓螈）(Dermophis mexicanus)
Bloch's catfish （布氏油鲶）(Pimelodus blochii)

7"Freshwater Shark"17 May 200912 May 2010
Sharks are perhaps the most dangerous and feared of all fish, but these predators are confined to the oceans. Or maybe not... The bull shark, the most dangerous and aggressive shark, has been known to swim miles up rivers. Jeremy follows reports of attacks in rivers near the most populated shores of Australia to find out why and how far these fish swim upstream. He traces the trail of blood left by these monsters from bays and lagoons to rivers, until he finally zeros in on the lair of these sea monsters. After seeing the evidence that these predators can even attack race horses and drag people underwater in completely fresh water, he realizes that he faces a creature even deadlier than a great white shark. While fishing for one, Jeremy finds something even more shocking and terrifying than a fully grown shark.
Featured animals
Bull shark （白真鲨）(Carcharhinus leucas)
Saltwater crocodile（湾鳄） (Crocodylus porosus)
Giant grouper（鞍带石斑鱼） (Epinephelus lanceolatus)
Freshwater crocodile（澳洲淡水鳄） (Crocodylus johnsoni)
Short-finned eel （澳洲鳗鲡）(Anguilla australis)

就这些吗

Season Two (2010)[edit]
EpisodeTitleOriginal air dateUnhooked air date
8"Demon Fish"28 March 201016 August 2010
Jeremy travels deep into the jungles of the Congo in search of a little-known predator that may be the most terrifying monster of all: the fearsome Goliath tigerfish. This creature combines everything that made all previous river monsters deadly, and even more. Growing to 6 feet long with the jaws and teeth of a crocodile and an attitude of a shark, this beast is covered in armor plating and thick muscle. Basically a giant piranha, the tigerfish is believed to be responsible for gruesome deaths on humans, both in and out of water. The search for the elusive tigerfish pushes Jeremy to his mental limit as he uses everything he knows as a fisherman, as well as some luck from a witch doctor, to find this terrifying monster and uncover the truth behind a number of violent attacks. After several unsuccessful bites, he finally lands a true monster, but then he enters a dilemma to share this fish with the locals or let it swim away.
Featured animals
Goliath tigerfish （巨狗脂鲤）(Hydrocynus goliath)
Blockhead cichlid（刚果隆头丽鱼） (Steatocranus casuarius)
African arowana （尼罗异耳骨舌鱼）(Heterotis niloticus)
Smallmouth electric catfish （小口电鲶）(Malapterurus microstoma)
West African bichir（后翼多鳍鱼） (Polypterus retropinnis)

9"Death Ray"25 April 201020 August 2010
Jeremy Wade ventures to the Mekong River in Thailand to find what may be the largest freshwater fish: the giant freshwater stingray. Armed with a 10 inch, venom-coated barb, this fish grows to 16 feet long and its venom has no known antidote. Unlike most South American freshwater stingrays (which usually don't get very big and deadly), this creature is a true monster. This behemoth can nearly glue itself to the bottom of the river, and once Jeremy hooks one, it may be his biggest challenge yet. In this adventure he also meets other giants of Southeast Asia: the gentle Mekong giant catfish, a close relative of the well-known iridescent shark. The giant barb he caught in this trip only appears on some photographs made during filming, but not in the actual episode or the extended cut.
Featured animals
Giant freshwater stingray （查菲窄尾魟）(Himantura polylepis)
Mekong giant catfish（湄公河巨鲶） (Pangasianodon gigas)
Ocellate river stingray （眼斑江魟）(Potamotrygon motoro)
Giant barb（巨暹罗鲤） (Catlocarpio siamensis)

11"Congo Killer"9 May 20106 August 2010
Jeremy Wade travels to the Congo once again, the only river to ever defeat him. He had once travelled there, only to catch nothing. Now he's back, investigating reports of fishermen being dragged to their death by a malevolent river spirit. Wade suspects the Suni or Vundu catfish and the Kamba catfish, which are known to grow to large sizes. But he begins to wonder if there are any monstrous sized fish out there in these waters. While staying with local villagers, he faces their superstitious beliefs because they blame his arrival for the disappearance of the chief's brother. Even mosquitoes are deadly here. In the past, Jeremy nearly lost his life to malaria. After using traditional Congolese fishing methods, hearing of how one fisherman died, and finally facing a catfish, Jeremy begins to wonder if the real danger isn't the fish itself.
Featured animals
Kamba catfish （克氏金鲿）(Chrysichthys cranchii)
Giraffe catfish （西方项鲿）(Auchenoglanis occidentalis)
Vundu catfish（长丝异鳃鲶） (Heterobranchus longifilis)
Obscure snakehead （暗副鳢）(Parachanna obscura)
Marbled lungfish（石花肺鱼）(Protopterus aethiopicus)
Gambian malaria mosquito （冈比亚疟蚊）(Anopheles gambiae)

12"Alaskan Horror"16 May 201019 August 2010
Deep in the Alaskan wilderness, Lake Iliamna is supposedly the home of a monster. Reports claim it grows 20 feet long and is responsible for the disappearance of many fishermen. Investigating the identity of this creature, Jeremy faces cold-water fishing for the first time during the series. He investigates the possibility of the monster being a pike or a beluga whale, but none would match the description. Wade then tries to find out a possible food source: salmon. This results in the first salmon he has on the end of his line, only to have it stolen by a bear. After hearing an eyewitness' encounter, Jeremy is able to determine the identity of the culprit: a white sturgeon. These fish grow to 20 feet long and are known to leap out of the water, which could result in people going missing. Fishing for sturgeon, Wade soon faces what may be the biggest fish he's ever caught (although this episode was shot before "Death Ray", which features his biggest catch in this season).
Featured animals
White sturgeon （高首鲟）(Acipenser transmontanus)
Grizzly bear （北美灰熊）(Ursus arctos horribilis)
Beluga whale （白鲸）(Delphinapterus leucas)
Northern pike（白斑狗鱼） (Esox lucius)
Sockeye salmon（红大马哈鱼） (Oncorhynchus nerka)
Harbor seal（港海豹） (Phoca vitulina)
Salmon shark （鲑鲨）(Lamna ditropis)

13"Rift Valley Killers"23 May 201019 August 2010
In the heart of Africa's Rift Valley, lives the Nile perch, Africa's largest freshwater bony fish. Growing to more than 6 feet long (according to some fishermen's photographs), this fish is considered a prize and is what many people brave countless perils to catch. Jeremy travels to the birthplace of humanity and the oldest and most dangerous fishing spot he ever visited to find this legendary creature. He faces off against deadly crocodiles, even deadlier hippos, and killer gangs to find the perch, and is amazed at the daily dangers people face every day in order to catch this fish. He then takes on these perils, even risks his life in order to land a monster perch.
Featured animals
Nile perch（尼罗尖吻鲈） (Lates niloticus)
Semutundu catfish（多克玛鲿） (Bagrus docmak)
Nile tilapia（尼罗罗非鱼） (Oreochromis niloticus)
African rock python（非洲岩蟒） (Python sebae)
Hippopotamus（河马） (Hippopotamus amphibius)
Nile crocodile （尼罗鳄）(Crocodylus niloticus)

14"Hidden Predator"30 May 201012 August 2010
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.
Featured animals
Bull shark（白真鲨） (Carcharhinus leucas)
Backwater butterfly ray（裸尾燕魟） (Gymnura natalensis)
Dusky kob（日本白姑鱼） (Argyrosomus japonicus)
Smallspotted grunter （康氏石鲈）(Pomadasys commersonnii)
Bluespotted stingray （古氏魟）(Dasyatis kuhlii)
White sea catfish （非洲雅首海鲶）(Galeichthys feliceps)
Grass carp（草鱼） (Ctenopharyngodon idella)

Season Three (2011)[edit]
EpisodeTitleOriginal air dateUnhooked air date
15"The Mutilator"10 April 201129 May 2011
Deep in the jungles of Papua New Guinea, two separate deaths have attracted the media: two men were found to have bled to death in the Sepik river as a result of a "ball cutter" attacking villagers. Jeremy Wade travels to this unexplored river to uncover the creature responsible for the savage attacks. While fishing for a possible food source, Wade makes an unusual discovery. Apacu from the Amazon river. These fish are related to the piranha and are from South America, where they use their strange, almost human-like teeth to actually crack hard-shelled nuts and fruits and eat them. Jeremy makes a terrible discovery about the seemingly-placid red-bellied pacu living in the Sepik. These animals here can actually have a taste for human flesh.
Featured animals
Red-bellied pacu（短盖肥脂鲤） (Piaractus brachypomus)
Saltwater crocodile（湾鳄） (Crocodylus porosus)
Triangular-shield catfish（背盾新海鲶） (Neoarius leptaspis)
Nile tilapia（尼罗罗非鱼） (Oreochromis niloticus)