Though he was undergoing chemotherapy treatment when he started shooting his role as an FBI agent in A&E's The Beast, Swayze didn't let it hold him back. "I'm a miracle, dude," he told photographers and fans while boarding a flight in July 2008 from Los Angeles to the series' Chicago set. "I don't know why." Staying busy on the drama – and even performing his own stunts – helped his determination. "He didn't want anyone to pamper him," consulting producer Michael Dinner told PEOPLE in January.