A.W.O.L.

"A.W.O.L." is the upcoming eleventh episode of the fourth season of Arrow and the eightieth episode overall.

Synopsis
Diggle must learn to trust his brother Andy when an enemy of their wartime past, an agent of the criminal organization Shadowspire, pays a visit to Star City. However, Diggle learns more than he bargained for about their shared time at war. Meanwhile, Oliver has to learn a whole new way of life.

Production
Preparation ran from October 29 until November 6, 2015. Shooting ran from November 9 until November 23, 2015.

Behind the scenes

 * The term "A.W.O.L." stands for "absent without leave", or "absent without official leave".