"Jeopardy!" host Alex Trebek says that he may leave the show because of his cancer treatment. In a recent interview the Sudbury, Ont.-native confessed that chemotherapy has significantly "diminished" his ability to host the popular quiz show. Trebek says he plans to continue hosting "Jeopardy!" for now, but also admitted that he would stop if his skills “diminish” too much. The 79-year-old went on to say that he is “not afraid of dying” and that he’s lived a “good” and “full” life.