In a recent interview, Andrew Kreisberg, the executive producer of Arrow, spoke about the upcoming episodes leading up to the finale of season 2.

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Kreisberg spoke to TVLine about how the finale, titled Unthinkable, will befit its name. The most siginficant observation relates to Slade. "His specific target will come as a big surprise to everyone," Kreisberg said. "You'll have to see how it plays out." 

Kreisberg added that all the pieces will fit and different storylines will tie in in the finale of the CW series.

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"There may have been a lot of what seemed like detours this season, but it all plays out in the last few episodes," Kreisberg said. "Hopefully, everyone will see the method to our madness and find the finale to be an exciting culmination of the season, as opposed to just a great episode."

Here's the official synopsis for Unthinkable:

"Oliver must decide for once and for all if he is a killer or a hero - 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. John Behring directed the episode with story by Greg Berlanti and teleplay by Marc Guggenheim & Andrew Kreisberg."

Unthinkable will air on May 14 on CW.

Watch the trailer of the latest episode, Streets of Fire: