In order to defeat Diaz, Oliver needs the help of the FBI. In exchange for that help, Oliver gives himself up to Agent Watson and goes to prison. After some harrowing encounters with his ex-foes, Oliver is freed in exchange for testifying against Diaz. Of course, Diaz somehow arranges to break into prison to kill Oliver, but his plans are foiled.
Upon being freed, Oliver wakes up one morning and finds himself living the Flash’s life, and he soon discovers that the same thing has happened to Barry. They manage to convince everyone that they’re not crazy and seek help from Supergirl, who properly recognizes them. It turns out that a cosmic being named the Monitor has given deranged psychiatrist John Deegan a magical book that he uses to change reality. Eventually defeating him, Oliver makes a deal with the Monitor in exchange for Barry and Kara’s lives.
Diaz is killed in prison, but not before he reveals his connection with a shadowy figure named Dante, the leader of a terrorist organization called the Ninth Circle. Another green-clad archer appears: it’s Emiko Adachi, another half-sister of Oliver’s, this time on his dad’s side. She initially appears to reconcile with Oliver but is revealed to be the secret leader of the Ninth Circle. She eventually switches sides and forgives Oliver before she’s killed by her own group. The bad guys are defeated, but Oliver and Felicity go into hiding as she gives birth to their daughter, Mia.
Written by: Looper