Invasion of the Mystery Super-Men - Earth is shocked by raiders who are as mighty as Superman... and the Man of Steel learns they are from his own world! Only his pal, Jimmy Olsen, accompanies him on the dangerous mission to track them down!

the Dynamic Duo of Kandor - In Kandor, where he has no powers, Superman takes a leaf from the Batman's book, as he and Jimmy become Nightwing and Flamebird!

the City of Super-People - Olsen and his super-pal are hunted by the Kandorians... and Superman condemned to death! Their crime? Trying to save the city and everyone in it from certain doom!

the Caped Crimefighters of Kandor - The Batman and Robin of Kandor return when Superman and Jimmy are called on to stop a super-thief - in a place where Superman is not super!

the Super-Showdown in Kandor - With the new Nighthound, Jimmy works solo when Superman lies sick in Kandor! Can a youth and a dog stop a super-powered crook?

the World of Doomed Olsens - Condemned as a criminal by a mystery alien, Jimmy is exiled to a world in habited by grotesque copies of himself - in the weirdest forms he has taken!

Plot summaries taken from the table of contents of the issue itself.