UPDATE: International Promos For Next Week's Episodes Of THE FLASH & ARROW

AUSTIN BUTLER ("THE CARRIE DIARIES") JOINS THE CAST AS CHASE; OLIVER DEALS WITH CARRIE CUTTER - Oliver (Stephen Amell) must stop an Arrow-obsessed serial killer, Carrie Cutter (guest star Amy Gumenick), who is convinced that The Arrow is her one true love and will stop at nothing to get his attention. Unfortunately, her way of getting his attention is to kill people. Meanwhile, Ray (Brandon Routh) asks Felicity (Emily Bett Rickards) to be his date for a work dinner with important clients. Thea (Willa Holland) auditions new DJs for Verdant and meets Chase (Austin Butler), a brash DJ with whom she immediately clashes. Rob Hardy directed the episode written by Wendy Mericle & Beth Schwartz (#307).

GREG FINLEY GUEST STARS AS DC COMICS' VILLAIN GIRDER - The Flash (Grant Gustin) faces a new meta-human named Tony (guest star Greg Finley, "Star-Crossed," "Secret Life of the American Teenager"), who can turn himself into girded steel at will. While Dr. Wells (Tom Cavanagh) and Caitlin (Danielle Panabaker) are concerned about Barry's safety, Cisco (Carlos Valdes) comes up with a plan to take Tony down. Meanwhile, Iris's (Candice Patton) blog on The Flash gets her into trouble, and Eddie (Rick Cosnett) witnesses Tony's abilities firsthand and begins to ask questions that Joe (Jesse L. Martin) doesn't want answered. Joe asks Dr. Wells to help him solve Nora Allen's murder. Millicent Shelton directed the episode written by Jaime Paglia & Chris Rafferty (#106).