All the reward and immunity challenges in Season 40 will be blasts from the past. "It’s all classics," Survivor challenge producer John Kirhoffer tells EW. "We’ve switched up, as we sometimes do. A different classic front end with a different classic back end. So we might have a front end of a challenge from Heroes v Healers v Hustlers with a puzzle from Kaoh Rong, which is something we actually have. So that type of stuff. But it’s classics that you’ve seen."