Sword Art Online: Alicization – War of Underworld Season 2 Episode 4 English Dubbed Episode Title:Code 871.Episode Description:Revealing that he is the traitor cooperating with the Americans, Yanai confesses that he used to work with Sugou in his illegal experiments and was also working with Administrator to sabotage the Alicization Project out of love for her and wants Kirito to die in revenge for her death. Meanwhile, Kikuoka and Rinko discover that Yanai was responsible for inserting code 871 into UW and realize his betrayal. At UW, Subtlizer overpowers Sinon but she is saved by her connection with Kirito, while Sheyta and Iskahn are about to be killed along the surviving pugilists when Leafa and Lilpilin arrive with the Orc forces to rescue them and the ALO players attempt to convince the Chinese and Korean players that they were deceived but Vassago intervenes and stops them...