Stargirl creator Geoff Johns breaks down the return of John Wesley Shipp's incarnation of The Flash following Jay Garrick's surprising return in the epilogue of the series' season 3 finale. Shipp first portrayed Garrick in season 2 of The CW's The Flash, reprising the role in later seasons of the show while also making his Stargirl debut in season 2. In Stargirl season 3, episode 13, "Frenemies - Chapter Thirteen: The Reckoning", Garrick interrupts Jonathan Shake's The Shade during a guided tour of a Justice Society of America museum 10 years after the events of the series, where he recruited Richard Swift to face a new threat.

During a guest appearance on The Flash Podcast, Johns was asked whether the Stargirl season 3 finale flash-forward epilogue was developed with input from The Flash's showrunner Eric Wallace. Johns confirmed that he had discussed Garrick's appearance with Wallace, but intentionally set it in the future to...