Arrow Season 2 Finale: Unthinkable

The CW has released three sneak previews of the Season 2 Finale episode of Arrow, which is titled "Unthinkable." The first sneak preview is a trailer, which teases that it's "kill or be killed" in the showdown between Oliver and Slade. There's also a quick tease of the Flash. The second sneak preview is a clip where Oliver discovers that The Foundry has been compromised by Slade's army. The third sneak preview is a clip (via TV Guide) where Oliver gives Roy Harper a red mask to wear. In the "Unthinkable" episode of Arrow, Slade (Manu Bennett) moves forward with his plan to kill one more person in Oliver's (Stephen Amell) life. While Oliver has fought all year to be more than the killer he once was, when Slade kidnaps someone close to Oliver's heart, Oliver is pushed to the edge and realizes sometimes it takes doing the unthinkable to stop the monster. Meanwhile, Diggle (David Ramsey) takes on Amanda Waller (guest star Cynthia Addai-Robinson) with a little help from some friends, and Thea (Willa Holland) turns to Roy (Colton Haynes) in her time of need. The "Unthinkable" episode of Arrow is directed by John Behring with story by Greg Berlanti and teleplay by Marc Guggenheim & Andrew Kreisberg. "Unthinkable" is scheduled to air on Wednesday, May 14, 2014 at 8 PM ET on The CW.