Today in the USA, it’s National Catfish Day, celebrating “the value of farm-raised catfish”. Apparently that’s a big deal. Yeah, we don’t know either. But here in TV, and on the internet, the word Catfish means celebrating something entirely different. It’s the MTV show about people on the internet who might not be all they claim to be. Following on from the original documentary film, four seasons have thus far aired. But exactly why do audiences keep coming back?