"This got really bad," the Jeopardy! host tells Jane Pauley on the upcoming edition of CBS Sunday Morning, where he also reveals he's been wearing a hairpiece. "I was on the floor writhing in pain," he says. "It went from a 3 to an 11. And I just couldn't believe, I didn't know what was happening. And it happened three or four times a day while we were taping. So, that was a little rough on me." Trebek adds: "I taped the show and then I made it to the dressing room on one occasion, just barely, before I writhed in pain and cried in pain. And I had 15 minutes before the next show. So, I got myself together and spasms of that kind usually last about 10 to 15 minutes. So, all right, here we go again: 'Anybody got any pain pills?' And I don't like taking pain pills. But I got through it. And the producers were very kind. They said, 'Look, if you don't wanna do the show, we'll just cancel taping.' I said, 'No. We're here. We're doing the shows.'"