Arrow 5x23 "Lian Yu" Season 5 Episode 23 Trailer (Season Finale) - DEATHSTROKE, NYSSA AL GHUL, MERLYN AND DIGGER HARKNESS JOIN OLIVER'S BATTLE AGAINST PROMETHEUS - The battle between Oliver (Stephen Amell) and Adrian Chase (Josh Segarra) culminates in a final epic battle on Lian Yu. After recent events, Oliver decides to recruit a group of unlikely allies - Slade (guest star Manu Bennett), Nyssa (guest star Katrina Law), Merlyn (John Barrowman) and Digger Harkness (guest star Nick. E. Tarabay) - to defeat Chase. However, Chase has his own army - Black Siren (guest star Katie Cassidy), Evelyn Sharp (guest...
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