TV Line announced today that SMASH actor Andy Mientus will join The CW's Flash TV Series as the "openly gay" villain The Pied Piper. He will also be expected to debut on episodes 11 & 12 of The Flash. The site goes onto say:
"[Harley Rathway/Pied Piper] is a bona fide genius who used to work at S.T.A.R. Labs until a falling out with his mentor, Harrison Wells (Tom Cavanagh). The particle accelerator robbed Hartley of his hearing, but inspired him to create a series of sonic weapons that he uses in an effort to punish Wells by destroying his new protege: The Flash."
The Flash debuts every Tuesday on The CW