Watch Robin Williams: When the Laughter Stops

They were some of the brightest lights of their generations - supremely talented comedians who left us with indelible images and unforgettable experiences. But the demons that drove them to such heights also took them too early. Now, their lives persist in memory not just for their accomplishments but also for the tragic irony of how someone so full of joy - and capable of igniting that joy in others - could privately be consumed with such darkness. When the Laughter Stops," examines this brutal and tragic dichotomy, casting its incisive eye on the comedians' personal lives, while separating fact from fiction, creative work from the human being behind it, to probe not just from where their genius sprung - but how that same wellspring often lead to their demise.