Lian Yu

S5 E23: The battle between Oliver and Adrian Chase culminates in a final epic battle on the island of Lian Yu. After recent events, Oliver decides to recruit a group of unlikely allies – Slade Wilson/Deathstroke (guest star MANU BENNETT), Nyssa (guest star KATRINA LAW), Malcolm Merlyn and Digger Harkness (guest star NICK. E. TARABAY) – to defeat Chase. However, Chase has his own army – Black Siren, Evelyn Sharp and Talia al Ghul – and the forces collide in an explosive season finale.