Bond movies are only as good as their villains. The world's greatest spy needs an adversary worthy of his talents, effort and frequent-flyer miles.

For the most part, Bond has fought some world-class foes, supervillains who have cool secret lairs to dispatch their plans for world domination -- and give a Bond an excuse to judo chop or Q gadget them into oblivion. Some Bond villains, of course, are more fun than others, and some are scarier than others, and some represent more credible and realistic threats than others. We've taken all that into account in the gallery below, which ranks the 007 movie villains from worst to best.