Still in prison, Oliver faces his biggest challenge yet. Meanwhile, Felicity gets an intriguing offer, and Diggle asks Curtis to go undercover for ARGUS.

In order to track down Diaz from inside prison, Oliver realizes that will require aligning with an old enemy. Meanwhile, in Star City, Felicity’s attempts to root out Diaz are…

As the Dark Archer, Malcolm eliminates the scientists who created the Markov Device and then ships it to Starling City to destroy The Glades. Meanwhile, Oliver, Diggle, and Felicity infiltrate…

Oliver escapes imprisonment at Malcolm’s hands and races to stop his plan to level The Grades. Meanwhile, Moira makes a startling announcement, Thea looks for Roy when panic sweeps the…

When a hitman kills a couple that is going to testify against his employer, Laurel takes their young son in. She soon finds herself being stalked by the killer, and…

A new vigilante, The Savior, is capturing and executing those who he believes are preying on the people of The Glades… and Roy is his next target. Meanwhile, Moira must…

Helena is back to seek vengeance, but Oliver still has feeling toward her. The Arrow must stop and kill her, but at what costs? Now that several of his closest…

A jewel thief known as Dodger targets rare gems in Starling City. Felicity convinces Oliver to go after the thief, and Oliver bugs McKenna’s phone to get the information he…

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