The League of Freedom prepares for the worst as the resourceful Dr. Devizo plans his escape from the mansion's underground prison. Rex attempts to match wits with Devizo while Black Saturn goes undercover and American Ranger seeks retribution for Gloria's betrayal.

In the season finale, Dr. Devizo orchestrates a jailbreak of the League's most dangerous villains. Rex's past comes back to haunt him and the rest of the League's worst fears are realized.