Lian Yu (S05E23)

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 (Manu Bennett), Nyssa (Katrina Law), Malcolm Merlyn and Digger Harkness (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. (iTunes)