Complete story — includes the ending
Werner Zytle escapes custody by poisoning a guard with Vertigo. As Oliver tries to keep Laurel from being a vigilante, Merlyn informs him that, to beat Ra's, he will need to bring Thea onto the team. Oliver reveals the truth to her, who accepts and praises him for the work he has been doing as the Arrow. Laurel tracks down Zytle and takes him on herself, only to be poisoned with Vertigo. She begins to hallucinate images of Sara, which attack her. Oliver and Roy arrive in time to get her back to the hideout for treatment. Oliver realizes that the group does not fight for him anymore, but rather for the city. Chase attempts to kill Thea, but Roy and Merlyn show up; Chase instead commits suicide. Oliver and Laurel successfully capture Zytle together. On Merlyn's advice, Oliver takes Thea to the island for training. Laurel finally tells Quentin that she has been using Sara's vigilante persona and about Sara's death, although he already knows both. In flashbacks, Oliver is captured by A.R.G.U.S. and interrogated over the location of Maseo and his family. Maseo is captured trying to save Oliver. Waller brings Oliver and Maseo to Starling City to find Chien.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Arrow season 3. HTML formatting and reference markers removed. · Content license