John Oliver turned to a cadre of beloved Hollywood stars to help him with an important mission. The host returned on Sunday with an expose on the prevalence and spread of coronavirus conspiracy theories, and tasked some widely trusted public figures — including Paul Rudd and John Cena -- to help get his point across.After spending the better part of 20 minutes intricately debunking the most popular conspiracy theories circulating online about the virus, Oliver made a passionate plea for his viewers to try and combat the spread of these dangerous rumors.However, Oliver explained that science has shown that confronting people, shaming them for their beliefs, or trying to prove to them they are wrong will only strengthen those people's.