John Belushi, Richard Pryor

John Belushi and Richard Pryor had more in common than comedic brilliance. Each struggled with intense personal demons, detailed in the two-hour special, The Tragic Side of Comedy (Wednesday, 9 pm/ET). The BIO Channel show explores the troubled lives behind some of the most celebrated comedians of our time, including Chris Farley, Richard Jeni, Bernie Mac, and Andy Kaufman.

From SNL to Animal House, take a look back on the brilliant work of John Belushi and the struggle with drugs that led to his death-by-overdose at 33.

Richard Pryor, whose blunt talk about race and sex inspired a generation of comedians, somehow turned a life of tragedy into hilarity — even building a routine around the time he set himself on fire.