Following the reveal of the Pied Piper in the last "The Flash" promo, the CW released a clip that showed the alliterative villain in action. In this new scene, Hartley Rathaway lays his cards on the table when he lets Barry know that he overheard the identities of the Flash's friends over his radio -- and hints that he has knowledge of Wells' best kept secret. Check out the video below for some hero-against-villain action:

"The Flash's" next episode, "The Sound and the Fury," airs tomorrow at 8 p.m. on the CW.