That is the question asked by many moviegoers this week who aren't familiar enough with the works of Tolkien's Middle Earth stories to understand the subtitle of the new "Hobbit" sequel, "The Desolation of Smaug." Simply put, Smaug is a dragon who has "desolated" whole cities, and his defeat is the primary mission of Bilbo Baggins and the dwarves. And, in this adaptation, he's an enormous computer-generated creature voiced by Benedict Cumberbatch.
Smaug has appeared on the big screen before, in the 1977 animated version of "The Hobbit," but in this incarnation he rises to the ranks of one of the greatest movie dragons of all time.
What other beasts does he join on that list? We've named ten of them below. Did your favorite make the cut?