8. Legends of Yesterday

Complete story — includes the ending

Malcolm orchestrates a meeting between Vandal Savage, Barry Allen, and Oliver. Savage demands they turn over Kendra Saunders and Carter Hall or he will destroy both Central City and Star City with the Staff of Horus. They devise a plan to deliver the pair as a ruse to get close enough to destroy the staff. The plan fails; Kendra and Carter are killed and Savage uses the staff to destroy everyone else in the city. Barry escapes and runs fast enough to go back in time to the point of the original negotiation. Barry informs Oliver of his time travel and the mistakes that led to their defeat. They change their plan and Barry is able to steal the staff. He and Oliver use it on Savage, burning his body. Afterward, Kendra and Carter decide to use their powers to help others in another city. Cisco gives her a tracking device. Meanwhile, Oliver learns about his son, William, and accepts the condition of Samantha Clayton, William's mother, not to tell William or anyone else about the paternity in order to be able to see him. Malcolm collects Savage's ashes while whispering, "You owe me one, buddy." Note: This episode concludes a crossover event that begins on The Flash season 2 episode 8. The two episodes also set up Legends of Tomorrow.