High stakes and big money lead some athletes to cheat at the Olympic games. Tim Cross, The Economist’s Technology editor, investigates the prevalence of doping in sport and asks if testing can ever keep a lid on the use of performance enhancing drugs. He finds out the impact of the pandemic on testing at the Tokyo games, talks to Olympians about the pressures involved and imagines what if doping restrictions were removed. For full access to The Economist’s print, digital and audio editions subscribe at economist.com/podcastoffer and sign up for our new weekly science newsletter at economist.com/simplyscience.   See acast.com/privacy for privacy and opt-out information.