The CW has released the official synopsis for “A.W.O.L” the upcoming eleventh episode of Arrow.

“A.W.O.L” — (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)

DIGGLE VS. SHADOWSPIRE — Diggle (David Ramsey) must learn to trust his brother Andy (guest star Eugene Byrd) 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 (Stephen Amell) has to learn a whole new way of life. Charlotte Brandstrom directed the episode written by Brian Ford Sullivan & Emilio Ortega Aldrich (#411).

Original airdate 1/27/2016.