I saw one episode : Temple of The Viper. The episode is only about half devoted to these vipers. Adam spends a lot of time on other animals in the jungle during his trek to find a Temple Viper. It would have been interesting for Adam to mention something about the toxicity of the venom to humans. It's not a mild venom. It causes bleeding and necrosis but it cannot be compared, to say, the venom of the Bothriechis genus aka Palm Pit-Vipers. I'm not sure there are any fatalities on record.