Complete story — includes the ending
Ra's explains that the localized pool of water in Nanda Parbat has healing effects that have allowed him to live far longer than any mortal man. The pool is becoming less effective on him, so Ra's is looking for a replacement. In a show of good faith to convince Oliver, Ra's releases Diggle and Merlyn, forgiving all blood debts. Oliver returns to Starling and releases Nyssa, who refused to kill Thea. Oliver and his team go back to stopping crime, battling a new criminal named Murmur, but Quentin tells the Arrow that he will not aid him anymore because the group hid Sara's death. Afterwards, Oliver realizes that he is not ready to give up being the Arrow; Oliver informs Maseo of his decision, who warns Oliver of the consequences of defying Ra's. Upset with Ra's for his offer to Oliver, Nyssa leaves him and returns to Starling City, befriending Laurel and deciding to train her. Ra's, dressed as the Arrow, frames the vigilante for murder. Thea leaves Malcolm and moves in with Roy. In flashbacks to Hong Kong, Oliver and Akio continue to be on the run, during which they seemingly stumble across a woman resembling Shado.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Arrow season 3. HTML formatting and reference markers removed. · Content license