Alex Trebek talks challenges of cancer battle

The "Jeopardy!" host opened up about mortality, a new round of chemotherapy and his indecision over going public with his cancer fight.
3:38 | 10/07/19

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Transcript for Alex Trebek talks challenges of cancer battle
We are back now with that new interview with Alex trebek speaking about his pancreatic cancer fight as he starts a new round of chemotherapy. The longtime "Jeopardy" host crediting his family for their help but also, well, he's questioning his decision to go public with it. T.J. Holmes is back here with that. Robin, this line stood out to me from this new interview. He said I don't know if I'm strong enough to help alleviate somebody else's despair. Right? We've been looking at him as this inspiration. People have been calling him and wanting him to help lift them up and he admits now that's tough to do to take on that responsibility when he's going through his own pain. Alex trebek candid as ever in a new interview talking about his challenges of being a father, husband and celebrity while facing cancer. I have become in many ways the spokesperson for pancreatic cancer. It's tough sometimes trying to be as optimistic as you can and I don't know if I'm strong enough or intelligent enough to help alleviate some of that Reporter: The 79-year-old announced his cancer diagnosis earlier this year. Then doctors later described him as near remission. But when I sat down with trebek just last month he revealed how all of that changed. I lost about 12 pounds in a week. And my numbers went sky high. Much higher than they were when I was first diagnosed. So the doctors have decided that I have to undergo chemo again. Reporter: Despite the setback frequent pain and at times what he calls overwhelming sadness, trebek hasn't miss add day of I can be sitting in my dressing room and I get up and I'm not able to move but all of a sudden when Johnny says and now here is the host of "Jeopardy," Alex trebek, okay, let's go. Reporter: Now 36 seasons in, 8,000 episodes and counting. I will keep doing it as long as my skills do not diminish and they have started to diminish. Reporter: His strength mainly comes from his wife Jean. I think she gives it more to me and one of my concerns is the effect it has on her. Reporter: He also worries about the toll this is all taking on their two children. They were upset when they first learned about it. But they look at me and they don't see too many changes in me. You know, so it's not like, oh, god, he's deteriorating before our very eyes. Reporter: Trebek will tell you he's lived a full life but there are things left to do and see. It does bother me that I might pass on before I get to have a grandchild. Hint, hint. Always joking around but you all heard him his skills are starting to diminish. He says he can tell. He has a difficult time enunciating and slur words. The chemo has caused sores in his mouth. Others might not notice. Keen viewers will. When I can tell I'm not the Alex trebek I should be, I will step away. It's going to be his call. Bless his heart. No one wants to be the face of any kind of illness and for people to reach out to him and you can understand they would because he's been so public but it takes so much out of you. Getting through the day just getting up and, you know, trying to be your old self. To get on that camera and smile, it's tough. All those reflections are so thoughtful and intelligent. They are. Thanks, T.J. Coming up next the

This transcript has been automatically generated and may not be 100% accurate.

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