The Season 9 premiere sees the return of everyone's favorite speed demon in this new time slot formerly belonging to "Stargirl." Barry Allen (Grant Gustin), Iris West (Candice Patton), Caitlin Snow (Danielle Panabaker) and Joe West (Jesse L. Martin) will be back for more, while this season's guest stars include Javicia Leslie as Batwoman, Andy Maines as the Pied Piper and Sendhil Ramamurthy as Dr. Ramsey Rosso.