For the past six months, the Guardian journalist Michael Safi has been trying to find out who is behind an AI company that creates deepfakes. Deepfakes that are causing havoc around the world, with police and lawmakers baffled about how to deal with them. And in trying to answer one question, he has been left with a bigger one: is AI going to make it impossible to sort fact from fiction? Subscribe to Black Box, a new Guardian audio series on artificial intelligence, for all the remaining episodes. Help support our independent journalism at theguardian.com/infocus