Legion of Super-Heroes #54 (1988) (Mid Grade)

The Legion of Super-Heroes respond to a call from the prison planet of Labyrinth. A Khund named Garak has escaped and caused other cells to be opened as well. Polar Boy sends the swiftest of the Legion up ahead while he gathers the rest of the members that he could. They are able to save the day, placing back as many prisoners as they could back into holding. Ultra Boy learns that the whole prison outbreak was caused as a distraction so that Garak could free the Emerald Empress. Sensor Girl prepares herself knowing that she and the Emerald Empress will be fighting soon.