River Monsters (2009)

S03E05 Electric Executioner

Title: Electric Executioner Plot: Jeremy Wade ventures into Brazil's untamed frontier to investigate a river creature responsible for the deaths of three cowboys. His quest leads him into the heart of cattle country, where he uncovers startling details about a fish he's never encountered. Confronting his deepest fears, Jeremy embarks on a thrilling pursuit, ultimately tracking down his elusive target in a surprising location. Now, his challenge is to capture the beast while ensuring his own survival.