Eleven-Fifty-Nine

"Eleven-Fifty-Nine" is the eighteenth episode of the fourth season of Arrow, and the eighty-seventh episode overall. It aired on April 6, 2016.

Synopsis
Oliver and Diggle learn that Merlyn is going to try to break Darhk out of prison. Meanwhile, Laurel gets a surprising offer and Felicity has a heart-to-heart talk with Curtis.

Behind the scenes

 * This episode was originally going to include Felicity's coversation with Curtis, but it didn't happen.

Production
Preparation ran from February 2 until February 11, 2016. Shooting began on February 12 and ran until February 23, 2016.