This cover looks promising, doesn't it? Well, like so many of the 'bait & switch' covers produced at DC during the 70s, the interior tale comes nowhere near living up to that initial promise. Inside, things are a bit out of sorts in Metropolis. Clark Kent's behaviour is a bit odd, as he suddenly seems to have developed a backbone. One villain after another appears only to suddenly disappear. How can all of this be explained? Well, an inventive writer like Grant Morrison would have a field day with this type of concept. Unfortunately, it was up to Len Wein to hand in this uninspired script. Ready for the ending to be spoiled? It was all Don-El (who?), the head of Kandor's Superman Emergency Squad. Apparently, his subconscious jealousy of Superman led him to develop some form of mental illness wherein he ultimately posed as Superman. The only way to break this spell was for the real Superman to pose as a series of villains (using super speed to move from one to the other) until Don-El ultimately cracked. My head hurts after typing that. The concept of Kandor is fun, but it became such a lazy writing device, helping free anyone who had managed to write themselves into a corner. This is an example of DC shooting itself in the foot.