Showcase Presents: Legion of Super-Heroes #4

When Shadow Lass accidentally releases Mordru, four Legionnaires flee to Superboy's time to hide from him. Mordru tries to find the Legionnaires in Smallville, but they refuse to expose themselves. When a group of gangsters tries to take over Smallville, and the Legionnaires encourage the townspeople to defend themselves, the Legionnaires realize they need to return to the future to face Mordru. But as they prepare to time travel, Mordru finds them.