The two-hour TV special, which offers a personal look at Fawcett's 2 1/2-year battle with anal cancer, is slated to air on NBC Friday night.
"Cancer is a disease that is mysterious, headstrong and makes its own rules," Fawcett says in the video diary/documentary. "And mine, to this date, is incurable. I know that everyone will die eventually, but I do not want to die of this disease. I want to stay alive. So, I say to God, because it is, after all, in his hands, 'It is seriously time for a miracle.'"