It's always tragic when people die before their time, but what is it about comedians that makes the public feel a special kind of loss when they are suddenly gone, even if they were well into their old age.
The mind of the comedian is explored, as well as the difficult road that many seem destined to take where mental illness and substance abuse are remarkably common.
Famous comedians debate what are the differences between, qualities of and reasons for going off-color or keeping one's act clean, what makes a filthy joke work, and why some famously clean comedians will never take the R route.