The CW's highly-anticipated series The Flash is adding yet another villainous character to its growing Rogues Gallery in Season 1, with TV Line reporting that Hartley Rathaway, a.k.a. The Pied Piper, will be popping up towards mid-season.

The Pied Piper debuted in The Flash #106 in 1959, and is one of DC Comics' first openly gay characters. He was born deaf, but was cured later in life thanks to research conducted by his wealthy father. Hartley became obsessed with sound, creating a device that creates hypnotism through music along with vibrational damage. He frequently clashed with Barry Allen in the comics, a trend that will surely continue in the TV series.

In The CW Series, Hartley will be a former protege of S.T.A.R. Labs' Harrison Wells (Tom Cavanagh), who creates a device that wreaks havoc on Central City. It isn't known exactly what episode Hartley will appear in, or if the character has been cast at this time. He joins a number of villains that have already been confirmed for Season 1, including Dominic Purcell (Heat Wave), Wentworth Miller (Captain Cold), Clancy Brown (General Wade Elling), Robbie Amell (Firestorm), Robert Knepper (The Clock King) and Kelly Frye (Plastique).

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In related news, Access Hollywood has debuted a new set of character posters, featuring Barry Allen (Grant Gustin), Detective West (Jesse L. Martin), Iris West (Candice Patton), Caitlin Snow (Danielle Panabaker), Cisco Ramon (Carlos Valdes), Harrison Wells (Tom Cavanagh) and Eddie Thawne (Rick Cosnett). Take a look at the posters below, to get ready for the series premiere on Tuesday, October 7 at 8 PM ET on The CW.

<strong><em>The Flash</em></strong> Grant Gustin Character Poster
<strong><em>The Flash</em></strong> Jesse L. Martin Character Poster
<strong><em>The Flash</em></strong> Candice Patton Character Poster
<strong><em>The Flash</em></strong> Danielle Panabaker Character Poster
<strong><em>The Flash</em></strong> Carlos Valdes Character Poster
<strong><em>The Flash</em></strong> Tom Cavanagh Character Poster
<strong><em>The Flash</em></strong> Rick Cosnett Character Poster

After a particle accelerator causes a freak storm, CSI Investigator Barry Allen is struck by lightning and falls into a coma. Months later he awakens with the power of super speed, granting him the ability to move through Central City like an unseen guardian angel. Though initially excited by his newfound powers, Barry is shocked to discover he is not the only "meta-human" who was created in the wake of the accelerator explosion - and not everyone is using their new powers for good. Barry partners with S.T.A.R. Labs and dedicates his life to protect the innocent. For now, only a few close friends and associates know that Barry is literally the fastest man alive, but it won't be long before the world learns what Barry Allen has become...The Flash.

<strong><em>The Flash</em></strong> - Season 1 photo 1
<strong><em>The Flash</em></strong> - Season 1 photo 2
<strong><em>The Flash</em></strong> - Season 1 photo 3
<strong><em>The Flash</em></strong> - Season 1 photo 4
<strong><em>The Flash</em></strong> - Season 1 photo 5
<strong><em>The Flash</em></strong> - Season 1 photo 6