In the first season, Wade's weekly quest had him in search of piranha, goonch catfish (during his investigation of the Kali River goonch attacks), alligator gar, wels catfish, arapaima, piraíba, and the bull shark. All of them are potentially deadly creatures poorly understood by humans. The show also focuses on explaining the creatures' feeding habits, behaviour and conservation status. Rebroadcasts of the episodes with captions showing behind the scenes commentary from the host about the particular episode can also be seen on both Animal Planet and Discovery Channel. These episodes are going by the title River Monsters: Unhooked.
Mr. Scary-Voice Narrator tells us that after being home for a month, and still feeling terrible, Vince was diagnosed with three tropical diseases, including falciparum malaria, which is the most deadly type of malaria. 781b155fdc