while Green Arrow and Spartan infiltrate Tevat Noah to find Thea, Felicity and her father work with Curtis to stop HIVE from accessing Rubicon.
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
While Quentin tries to find a way to bring Laurel back, the team deals with her death... and a new Black Canary who is out for revenge at any cost.
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
Cupid returns and begins killing celebrity newlyweds. To lure her into a trap, Oliver and Felicity go through with their marriage, even though they've recently broken up.
Waverider crashed in the year 2046... and finds Star City under siege by criminals after Vandal completes his conquest of Earth. Heat Wave revels in the destruction, while Sara is shocked when she meets an old friend.moreless
To track down William and deal with Damien's mystic powers, Oliver call in a mystic ally of his own: Vixen, who can channel the spirits of any animal.
Oliver prepares to go up against Damien's wife in a debate of mayoral candidates. However, first he has to deal with a team of villainous demolition experts who plan to hit a major target. Meanwhile, Donna has second thoughts about her relationship with Quentin, and Curtis prepares a special engagement gift for Felicity.moreless
Nyssa and Malcolm make war on each other when Malcolm refuses to step down as Ra's to save Thea's life. Meanwhile, Felicity is reunited with her father and he reveals that he's the Calculator... and that he wants a chance to get back into her life.moreless
While the team battles a former ally working with a new villain, Felicity decides to step aside rather than give a presentation that can save Palmer Tech. In the past, Oliver fights the darkness within him with the help of an old friend.moreless
Team Arrow takes on Shadowspire, an elite black-ops military team gone rogue. When Diggle learns that Andy is connected to them, he turns to his brother for help. Meanwhile, Felicity deals with her first day back on the job as the computer hack for the team.moreless
While Oliver and the team hunt down Damien, Lyla gives Diggle some advice on how to deal with Andy. In the past, Reiter makes a deal with Oliver.
After Damien launches an attack on Oliver and his people at the bay, Oliver retaliates by exposing Damien and HIVE to the public. However, Damien has another trick up his sleeve. Meanwhile, Felicity finds Oliver's engagement ring, and Diggle tries to get the truth from an imprisoned Andy.moreless
Teams Arrow and Flash go to ground to come up with a plan to stop Vandal. Malcolm arranges a meeting with the immortal villain, but it doesn't go well. While the teams try to come up with a plan, Carter tries to reawaken Kendra's memories of her past lives.moreless
A mysterious immortal named Vandal Savage comes hunting for Kendra, and Barry and Cisco take her to Star City seeking Oliver's help. Meanwhile, Caitlin and Harrison create a speed enhancer, Velocity-6, but they need Jay to test it and he refuses.moreless
Diggle discovers that his brother is one of Damien's Ghosts, and Oliver insists on trying to rescue him. Meanwhile, Damien offers Oliver a deal, and Ray contemplates his future now that he's back from the dead.moreless
Team Arrow launches an attempt to rescue a miniaturized Ray from Damien's stronghold. Meanwhile, Felicity begins to wonder if she's losing herself in her relationship with Oliver, and Donna arrives in Star City to pay her daughter a visit.moreless
When Sara starts killing people, Oliver realizes that her body is without a soul and calls in a mystical friend--John Constantine--to reunite Sara's two halves. Meanwhile, Damian sends Quentin on a mission, and the police captain discovers information about Diggle's brother Andy.moreless
Laurel returns Sara to Star City to reunite with Quentin, but neither one of them reacts as she hoped. Meanwhile, Green Arrow and his team go after crooked cops who are ripping off drug dealers for personal profit, and Oliver prepares for his mayoral candidacy.moreless
While Oliver and Diggle set aside their differences to take on a new metahuman in Starling City, Thea and Laurel travel to Nanda Parbat to resurrect Sara and help Thea overcome her growing bloodlust.moreless
Jessica Danforth, an old family friend of the Queens, decides to run for mayor of Star City to provide a source of inspiration. A crazed hitman, Lonnie Machin, targets her for death and Oliver and his team are forced to step in. In the past, Oliver infiltrates the island and finds a poppy field run by Baron Reiter.moreless
With Star City in peril from a new gang, Laurel and Thea go behind Diggle's back and ask Oliver and Felicity to come back to help them.
To stop Ra's from wiping out Starling City's population, Oliver is forced to reveal his true loyalties. However, when Ra's escapes, Oliver is forced to turn to his friends for help... but they still don't trust him after his betrayal.moreless
Barry turns to Captain Cold for help when Harrison's plans threatens the imprisoned metahumans. Meanwhile, Iris makes a decision concerning herself and Eddie after the team rescues the officer from Harrison's underground base.moreless
The mole within the League of Assassins sends an unexpected ally to Starling City to summon Diggle, Felicity, and Laurel. Meanwhile, Thea is reunited with Roy.. In the past, Oliver and Maseo capture Shrieve and attempt to get the cure from him.moreless
While Ra's grooms Oliver to become his successor, Nyssa continues her training of Laurel in Starling City. However, Ra's soon sends men to bring his daughter home, and Laurel asks Diggle and Felicity to help protect her friend.moreless
Ra's al Ghul makes Oliver an offer he can't refuse. The team join Oliver on his journey to Nanda Parbat where a heartbroken Felicity decides to take matters into her own hands.