Arrow 4×11 “A.W.O.L.” – 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.