As Damien prepares to initiate nuclear armageddon, the team races against the clock to find the one man who can stop the launches: the Calculator.
While Oliver and Felicity make contact with a shaman who may be able to show Oliver how to oppose Damien, Thea takes a weekend off with Alex. Meanwhile, Andy comes after Diggle but he proves to be the bait in a much larger plan.moreless
Malcolm prepares to break Damien out of jail but discovers that a key piece of the Khushu Idol is missing. Meanwhile, Laurel receives a job offer.
The Bug-Eyed Bandit hacks the prison computers and engineers an early release for herself... and then goes Felicity and her spinal implant. Meanwhile, Damien adjusts to life in prison and makes contact with an ally.moreless
Oliver returns from Nanda Parbat with Malcolm and Diggle after hearing Ra's out, and questions his mission. Meanwhile, a new villain, Murmur, steals a shipment of industrial diamonds. And Quentin turns against Arrow after learning the vigilante knew the truth about Sara's death.moreless
Meg summons Sam and Dean when Castiel wakes up. However, the brothers have other problems on their hands when they get word of a teenager who has been struck by lightning and become a prophet, and may hold the key to defeating the Leviathans.moreless