finally tonight here, alex trebek marking one year in his battle against pancreatic cancer with a very personal new message. tonight, "jeopardy!" host alex trebek marking a milestone. marking one year in his battle with pancreatic cancer. >> hi, everyone. if you've got a minute, i'd like to bring you up to date on my health situation. >> reporter: trebek with a very candid, personal update. >> i'd be lying if i said the journey had been an easy one. there were some good days, but a lot of not so good days. i joked with friends that the cancer won't kill me, the chemo treatments will. >> reporter: the 79-year-old talking openly about the grueling treatments, the side effects, the depression. >> i brushed that aside quickly, because that would have been a massive betrayal. a betrayal of my wife and soulmate, jean, who has given her all to help me survive. it would have been a betrayal of other cancer patients who have looked to me as an inspiration