The FBI team hunts a dangerous enemy operative, and a deadly new foe emerges.

The team faces off against a formidable villain nicknamed The Calculator. Meanwhile, Nyssa makes her move and Roy Harper returns to Star City.

With time running out for Starling City, Oliver tries to stop Ra’s from unleashing the bioweapon and killing millions.

Ra’s tells Nyssa that she must marry Oliver or face death. Meanwhile, an unexpected ally travels to Starling City to ask Diggle, Felicity, and Laurel to help infiltrate Nanda Parbat….

Ra’s sets out to transform Oliver into his perfect heir. Meanwhile, Nyssa and Laurel draw closer, but their mentor/student relationship is threatened when Ra’s sends men to bring his errant…

Oliver has no choice but to accept Ra’s’s offer to resurrect Thea. In return, Oliver must become the Heir to the Demon.

After Roy confesses that he’s the Arrow, Oliver is forced to lie low as Quentin continues his quest to prove that Oliver is the real Arrow. Meanwhile, a metahuman kills…

Ra’s makes his next move against Oliver by reveling the Arrow’s secret identity to Quentin. Left without alternatives, Oliver has no choice but to surrender. Meanwhile, Ray is injured in…

Thea betrays Malcolm to the League, but Oliver sets out to rescue his lover’s killer so that Thea won’t suffer the guilt of arranging for a parent’s death. In the…

Brick and his men take over the Glades, and the police are helpless to stop them. With Oliver nowhere to be found, the team seems helpless. Meanwhile, Oliver tries to…

Brick takes three city aldermen hostage and demands that Mayor Castle turn the Glades over to him in return for their safe return. Meanwhile, Felicity turns to Ray for help…

With Oliver gone, Diggle, Arsenal, and Felicity have their hands full dealing with a new crime lord: Brick. Meanwhile, Ray prepares his battle armor, and in Tibet, a mysterious figure…

Ra’s al Ghul sends Nyssa and her lieutenant to Starling City to inform Oliver that the League will kill 50 people a day until Sara’s murderer is turned over to…

The Arrow is stalked by an ex-police officer who he rescued during the Mirakuru siege and has become dangerously obsessed with the hero. Meanwhile, Ray asks Felicity to accompany him…

A killer is murdering his victims and attempting to frame Ted Grant. The Arrow finally comes to his aid after Laurel protests her trainer’s innocence. Meanwhile, Roy goes to Felicity…

With crime at an all time low, Oliver decides to take a break and asks Felicity on a date. However, they’re interrupted when a new drug dealer take the name…

In Braavos, Arya sees the Many-Faced God. In King’s Landing, Queen Margaery enjoys her new husband. Tyrion and Varys walk the Long Bridge of Volantis.