The CW has released a preview for "Summer School: Chapter Four", the upcoming fourth episode of DC's Stargirl's fourth season. The episode, which is set to air on August 31st, will see the surprising return of Crusher Crock/Sportsmaster (Neil Hopkins) and Paula Brooks/Tigress (joy Osmanski), two members of the Injustice Society of America that survived the battle at the end of Season 1. The villains were mentioned to have been in prison earlier this season and from the looks of things, it sounds like they may have broken out, or at least that's what Pat (Luke Wilson) seems to think in the preview.