From the dark Hades of Greek Mythology to the fire-and-brimstone visions of fundamentalist thunderers, Hell has long held a particular grip over the human imagination. This History Channel documentary travels the world to peer into the darkest depths of this eternal fascination.They review literary landmarks that expanded our ideas of the Underworld, from Dante's Inferno and Milton's Paradise Lost to Mark Twain's anti-hero, and trace development of Christian, Moslem, Jewish, and Buddhist conceptions of the afterlife.