Season 05, Episode 23 – Lian Yu – Season Finale
The battle between Oliver and Adrian Chase culminates in a final epic battle on Lian Yu, as Season 5 ends. Oliver recruits a group of unlikely allies, Slade, Nyssa, Merlyn and Digger Harkness, to defeat Chase. However, Chase has his own army that includes Black Siren, Evelyn Sharp and Talia al Ghul.
Oliver Queen and his father are lost at sea when their luxury yacht sinks. His father doesn’t survive. Oliver survives on an uncharted island for five years learning to fight, but also learning about his father’s corruption and unscrupulous business dealings. He returns to civilization a changed man, determined to put things right. He disguises himself with the hood of one of his mysterious island mentors, arms himself with a bow and sets about hunting down the men and women who have corrupted his city.