VIDEO : Alex Trebek Has Lost His Hair Due To Chemo

Extra TV reports ?Jeopardy? host Alex Trebek is doing his best to keep his spirits high while battling pancreatic cancer. In a new promo clip of his upcoming ?CBS Sunday Morning" interview, Trebek revealed he has been wearing a hairpiece while filming the gameshow, since his chemotherapy treatments have made the 78-year-old's hair fall out. He said, "So what the challenge for 'Jeopardy!' viewers is right now is to figure out, 'Is that Alex's real hair or is that a full hairpiece?'" Trebek is taking the summer off from hosting and hopes to return in September.