Presumed dead for five years before being discovered on a remote Pacific island, billionaire playboy Oliver Queen returns home a changed man.
Oliver sets his sights on taking down a criminal with ties to the Chinese triad: Martin Somers, who's being prosecuted by Laurel.
When a gunman kills one of Oliver's targets, he enlists Det. Lance's help. Meanwhile, Laurel and Tommy find themselves caught in an awkward situation.
While looking into a murder case, Oliver realizes that one of the targets on his list has framed an innocent man for the crime.
When Oliver is arrested for murder, he insists that Laurel represent him in court. She takes the case, putting her at odds with her father.
A band of bank robbers dubbed the Royal Flush Gang seriously wounds an off-duty police officer during a heist, forcing Oliver to rethink his mission.
The Huntress arrives in Starling City and puts Oliver under her spell. Meanwhile, adverse events blindside Tommy, who turns to Laurel for support.
Oliver trains Helena to be his ally. Later, her pursuit of vengeance leads Helena to kill the leader of the triad.
Determined to make up for lost time and restore a sense of normality to the Queen household, Oliver throws a family Christmas party.
After the Dark Archer defeats Oliver, he loses confidence and takes a break from being Arrow -- until Laurel needs help probing a firefighter's death.
Oliver suspects that Diggle's mentor is responsible for some armored truck robberies. Meanwhile, Thea believes Moira and Malcolm are having an affair.
Thea finds herself in legal trouble after getting caught with a drug called Vertigo. Meanwhile, Felicity gives Oliver disturbing news about Moira.
A nasty crook released from prison plans to reclaim his place as leader of Starling City's underworld but first must take down his biggest foe: Arrow.
When Oliver is shot, he turns to Felicity for help. While hovering between life and death, he flashes back to a daring escape attempt on the island.
Oliver asks Det. McKenna Hall on a date. Meanwhile, a jewel thief named Dodger hits Starling City and targets someone close to Oliver.
Oliver and Diggle learn that Deadshot is still alive and that Malcolm is the next target. Meanwhile, Oliver urges Tommy to reconcile with his father.
The Huntress returns to town and threatens to destroy everything and everyone Oliver cares about. Later, Steve Aoki headlines the nightclub opening.
An angry resident of the Glades embarks on a kidnapping and killing spree to punish those he believes have wronged the residents of his neighborhood.
When a young woman meets a violent death after partying at Verdant, Det. Lance uncovers incriminating evidence against Tommy.
When Deadshot returns to Starling City after taking down a U.S. ambassador and six others abroad, a sting operation is launched to capture him alive.
As Oliver focuses on crossing another name off the list, Felicity finds a transaction on a shady accountant's laptop that may help him locate Walter.
With the Undertaking just days away, Malcolm dons his black hood to conclude business with seismologist Brion Markov and his team.
In the season finale, Oliver and Diggle try to stop the Dark Archer from unleashing his vengeance on the Glades. Meanwhile, Thea races to find Roy.
With Starling City and Queen Consolidated deteriorating fast, Diggle and Felicity travel to Lian Yu Island to convince Oliver to return as the Arrow.
Oliver learns that medicine is being hijacked on the way to Glades Memorial Hospital, leading to a showdown with Bronze Tiger and China White.
Felicity offers herself as bait so Arrow, Diggle and Lance can catch a criminal who broke out of prison and is torturing and murdering women.
Oliver learns that a man known as "The Mayor" is bringing illegal guns into the Glades, so he sponsors a cash for guns event to clean up the city.
Oliver tries to get the Canary to reveal her background. Meanwhile, the Assistant District Attorney offers Moira a life-or-death deal.
Diggle learns that Lyla is missing after following a lead in Moscow. Moira's lawyer tells Thea that dating Roy is hurting her mother's case.
A mysterious illness sweeps the city, infecting hundreds of people -- including Diggle. Moira goes on trial for her participation in the Undertaking.
A seemingly impossible robbery at Queen Consolidated's Applied Sciences Division brings Central City police scientist Barry Allen to town.
Oliver is visited by ghosts from the past. Meanwhile, Barry continues to help Felicity, and their connection grows stronger.
Oliver must tackle a new threat when bombs start to go off in Starling City, and Thea witnesses Roy's super-strength in action.
Arrow teams up with Laurel to find the Man in the Mask, and when Sin tests Roy's superstrength, the results are nearly fatal.
Arrow offers to teach Roy to control his superstrength, but Roy proves to be a rebellious student. Meanwhile, the Bronze Tiger becomes a threat again.
Sara is forced to make an important decision when her past with the League of Assassins comes back to haunt her -- and her family.
The team goes after the Clock King, who has tech that can open any bank vault in Starling City, while Sara ruffles Queen's feathers.
Back on the island where Oliver spent years shipwrecked, his plan with Slade and Sara to take over a freighter from Ivo takes a deadly turn.
With Slade back and vowing revenge on Oliver's loved ones, Oliver prepares for battle; Diggle is recruited by A.R.G.U.S. to stop a warlord.
When Frank Bertinelli is arrested and Laurel is picked to try the case, Bertinelli's daughter, the Huntress, returns with her own take on justice.
Slade makes his move against Oliver, with enormous repercussions. Meanwhile, Isabel attempts to take Queen Consolidated away from Oliver.
After an epic battle with Slade, one member of Team Arrow is sent to the hospital, and Oliver is forced to make a tough decision involving Thea.
When the team realizes that the Mirakuru has taken over Roy completely, rendering him deadly and out of control, they're forced to take action.
To stop Slade, Oliver may have to make the ultimate sacrifice, but Diggle and Felicity go to extreme measures to stop him.
Oliver and his team rally to stop Slade's soldiers as they attack Starling City. Meanwhile, Malcolm Merlyn returns.
Oliver's no-kill rule is put to the ultimate test when Slade kidnaps someone close to Oliver's heart. Meanwhile, Diggle takes on Amanda Waller.
In the wake of Slade's downfall, the peaceful city celebrates, but Werner Zytle has a deadly plot up his sleeve, and a homicidal archer targets Sara.
Oliver pursues a murderous archer; Laurel tries to take justice for Sara's death into her own hands; Thea makes progress in her training with Merlyn.
Oliver trails Thea to an island, hoping to bring her back to Starling City; Oliver helps Diggle find a missing ARGUS agent; Laurel tries to toughen up.
When Oliver sends Roy out to tail Nyssa and learn more about Sara's killer, Thea gets kidnapped, and Oliver makes a dangerous enemy.
Felicity investigates a cyberattack on Starling City and discovers that she herself created the virus; Roy's nightmares tell him that he killed Sara.
When bodies appear at the gym, Oliver helps prove Ted Grant's innocence and catch the killer; Roy faces the aftermath of the Mirakuru virus.
Oliver investigates a menace named Cupid, who is romantically obsessed with him; Oliver feels pangs of jealousy over Ray's rapport with Felicity.
A boomerang-wielding murderer defies Oliver's team and ARGUS; Digger lays a trap for Lyla with the intent to kill her and whomever stands in his way.
The League of Assassins issues a terrifying threat; the DNA results of Sara's murder investigation shock Felicity; Oliver faces a formidable foe.
With the Arrow gone, Diggle and Roy strive to protect Starling City as a new crime lord plots a power grab; Merlyn finds evidence of Oliver's demise.
Maseo and Tatsu must go to extremes to protect the healing Oliver; Brick kidnaps a city official and tries to banish the police force from the Glades.
Oliver finds a mentor to help him bring down Ra's; Capt. Lance advises Roy and Laurel on fighting Brick's men; Merlyn discovers who killed his wife.
When Laurel tries to capture Zytle after his prison break, he doses her with his poison, Vertigo; DJ Chase tries to murder League trainee Thea.
As Oliver starts training Thea on the island of Lian Yu, Slade captures and imprisons them, and Thea is forced to face a painful truth.
Oliver sets out to rescue Merlyn to keep Thea from disconnecting with her humanity once she realizes that she has sealed her father's dire fate.
With a plot in mind, Ra's pushes Oliver to take over the League, revealing the secret of his longevity; Capt. Lance withdraws his support of Arrow.
A honeymoon for Diggle and Lyla is cut short when they are recruited for a dangerous rescue mission; an Arrow imposter murders the mayor.
Arrow's team is hunted down for the mayor's murder; a wound threatens Ray's life; Ra's kidnaps Captain Lance and exposes Arrow's identity.
When Roy is arrested, Oliver's crew plots to spring him from prison and protect Arrow's identity; Ray needs Oliver's help to bring down Jake Simmons.
When Oliver tries to bring Thea back from the brink of death, he is forced to renounce his old life and step into a new role with the League.
Oliver takes on a new identity and a daunting test of allegiance; Ra's recalls dueling his best friend to become the leader of the League.
Diggle and Laurel patrol Starling City; Oliver learns who provided Ra's with the Omega virus and confesses the truth about his place in the League.
Oliver and his team race to stop Ra's from releasing the virus and destroying Starling City, but as the dust settles, Oliver makes a fateful choice.
When Damien Darhk attacks newly renamed Star City with a gang of assassins, Oliver rebuffs an old ally and returns as the Green Arrow to fight back.
Green Arrow and Speedy track an assassin who targets a family friend. Meanwhile, Thea's bloodlust escalates, and Oliver decides to run for mayor.
While Thea and Laurel try to revive Sara with the Lazarus Pit, Oliver and Diggle must make peace and team up in order to confront a new assassin.
While Oliver sets a trap to catch a group of crooked cops, Laurel takes Quentin to see Sara, who is feral and chained up in Laurel's basement.
When Sara turns savage, Oliver calls in John Constantine to restore her soul to her body. Meanwhile, Diggle learns the truth about his brother.
Learning that the explosion miniaturized Ray, the team launches a mission to rescue him from Damien Darhk and return him to normal size.
Thea discovers a potential but risky cure for her bloodlust, and the team asks Ray for help when they learn that Andy is alive but working for Darhk.
Oliver and Barry use ingenuity and a little time travel to protect Carter Hall and Kendra Saunders from immortal assassin Vandal Savage.
After Oliver exposes him as the force behind H.I.V.E., Darhk kidnaps Diggle, Thea and Felicity, prompting Oliver to take a desperate gamble.
Desperate to get revenge for Felicity's near-fatal wounding, Oliver uses freelance anarchist Lonnie Machin to go on the hunt for Damien Darhk.
While Felicity adapts to her new role in Team Arrow, Diggle and Andy help Oliver track sinister Shadowspire operatives trying to infiltrate A.R.G.U.S.
Oliver and Thea get a surprise when they chase a burglar being controlled by a villain named the Calculator, who has a dire plan for Star City.
Hoping to obtain a cure for Thea's bloodlust, Oliver pits Nyssa and Malcolm against each other in a battle for control of the League of Assassins.
Darhk dispatches mercenaries to blow up key targets in Star City, including the venue where mayoral candidate Oliver plans to debate his opponent.
Vixen uses her mystical powers to help Team Arrow trigger a showdown with Darhk. Meanwhile, the truth drives a wedge between Oliver and Felicity.
When Cupid returns and begins attacking newlyweds, recently estranged Oliver and Felicity lay a trap for her by going through with their wedding.
Desperate to get her hands on Felicity's microchip implant, Brie Larvan escapes prison and attacks Palmer Tech, using robotic bees to fend off Oliver.
Oliver and Diggle discover that Malcolm has a plan to spring Darhk from prison. Meanwhile, Laurel gets a tempting offer.
When the Black Canary strikes again, Oliver and Quentin spar over Laurel's fate. Meanwhile, a plot targets Mayor Adams, and Oliver vows to kill Darhk.
Felicity and Oliver seek out a shaman who reveals the source of Darhk's magical powers, and the team uncovers his sinister master plan.
As Darhk launches his cataclysmic plot, Oliver and the team turn to Felicity's father to thwart it. But H.I.V.E. also has him in their sights.
Darhk renews his efforts to carry out his doomsday plan, and Oliver and Diggle infiltrate a secret H.I.V.E. facility in search of Thea.
While the team scrambles desperately to avert a global cataclysm, Oliver draws on a surprising power to confront Darhk once and for all.
While Felicity pushes to bring in new recruits and Oliver grapples with letting go of the past, brutal crook Tobias Church begins his ascent to power.
Green Arrow tries to train new recruits but must do some soul-searching first. Meanwhile, Church makes a move to ensure his domination of Star City.
Insolent Wild Dog deserts the new team to take on a drug kingpin by himself, forcing Green Arrow into a dangerous showdown.
With Oliver out on a mission to free Diggle, Church mounts an attack against Star City. Can the new team meet the threat without their leader?
While he faces an assassination threat as mayor, Oliver turns to old ally Human Target to help rescue Wild Dog from Church's clutches.
Believing that Prometheus's lethal rampage is meant to send him a message, Green Arrow tries to unravel the mystery while keeping his team from harm.
Green Arrow and the team wrangle over a deadly new vigilante prowling Star City's streets, and Thea stands up for Quentin after he reveals a secret.
When aliens invade, team Green Arrow joins forces with Flash, Supergirl and the time-traveling Legends of Tomorrow to face the intergalactic threat.
After a vicious attack reveals that Prometheus knows all their secrets, the team faces a shocking betrayal from one of their own.
A surprise doppelganger sets Green Arrow and Felicity at odds, and DA Chase tangles with military brass to save Diggle from a virtual death sentence.
Green Arrow's search for a new Black Canary turns up a promising but loose-cannon candidate. Felicity tries to hack into the NSA to liberate Diggle.
A grave new threat takes the team to Russia, where Oliver runs afoul of an old Bratva comrade. In Star City, Rene faces a test of leadership.
A brutal attack on city hall forces Oliver to seek justice as Mayor Queen, not Green Arrow. Rene relives his journey from family man to masked hero.
After a jailbreak, Green Arrow's hunt to apprehend vengeful villains Liza Warner, Cupid and China White faces shocking interference from the ACU.
After being targeted by Vigilante, Oliver fights impeachment proceedings at city hall while Diggle and the team angle to take out Vigilante for good.
Green Arrow closes in on the true identity of Prometheus, who takes a hostage close to Oliver's heart. Felicity faces an ultimatum from Helix.
Now unmasked, Prometheus sinks his claws into Oliver to exact revenge and elicit a confession about Green Arrow's dark and violent past.
Dissension rends Team Green Arrow when Oliver calls on his old -- and volatile -- Bratva allies to eliminate Prometheus once and for all.
With all of Star City on the hunt for Adrian Chase, Felicity defies Oliver and turns to Helix for help -- but their assistance comes at a steep price.
A mysterious explosion disables Felicity and traps Oliver and her alone in the bunker. Diggle and Lyla face issues in their marriage.
The hunt for Adrian Chase leads Team Arrow to a confrontation with Sampson. A macabre delivery at city hall sends Oliver a disturbing message.
A friendly surprise catches Oliver off guard, and the team scrambles when they discover that Adrian Chase has begun hunting them down, one by one.
Desperate to save his team and family, Oliver returns to the island of Lian Yu and recruits an old foe for a climactic showdown with Adrian Chase.
While Quentin struggles to make peace with his actions back on Lian Yu, Black Siren begins a bombing campaign against the SCPD and Team Green Arrow.
A dogged FBI agent targets Oliver in the wake of an incriminating leaked photo. Anatoly makes a daring strike. Diggle faces a difficult truth.
Diggle steps into his new role but faces a crisis of leadership when the team races to thwart a poison gas attack by Onyx and her crew.
As a series of perplexing murders unfolds across Star City, Felicity races to thwart an impending cataclysmic attack by Cayden James.
With Oliver's help, Slade tracks his missing son but makes a terrible discovery. A distressing revelation spurs Dinah to hunt down a rogue sniper.
Slade's quest to reunite with his son takes an ominous turn. Diggle's secret collides with the team's mission to take down a slippery drug dealer.
Oliver's holiday plans are cut short when Watson arrests him, prompting Cayden James and Black Siren to unleash an attack at a Star City rock concert.
Green Arrow joins Supergirl, the Flash and the Legends of Tomorrow to combat the Nazi invasion from Earth-X -- and an evil doppelgรคnger of himself.
The team celebrates a long-expected wedding but discovers a traitor in their midst. Cayden James forces Oliver into a mission-impossible heist.
A wedge driven between them, the team discovers that their bunker is compromised. A mob boss turns to Green Arrow for help against a common enemy.
Oliver scrambles to secure Star City after Cayden James unleashes a deadly, high-tech siege. Dinah and the new team clash over a shifty new ally.
While Cayden James hunts for a mole on his team, Felicity initiates a risky plan to neutralize the thermobaric bomb menacing Star City.
His old team in disarray, Oliver faces an ultimatum from Cayden James. Meanwhile, Dinah's thirst for vengeance drives her to go rogue.
While Star City faces financial ruin, former allies come to a violent crossroads over the fate of Black Siren. Meanwhile, Quentin harbors a secret.
Learning that Roy Harper has been taken captive in Star City, Thea takes up her Speedy suit and rejoins Team Green Arrow for a daring rescue mission.
A group of assassins on their trail, Nyssa, Thea and Team Green Arrow work to hack a cryptic map. Dinah and Curtis hunt for corrupt cops.
Diaz moves to consolidate his control of Star City. Diggle confronts Oliver over his leadership of the team -- and comes to a pivotal crossroads.
Pressures mounting on all sides, Oliver suffers troubling hallucinations that expose his deepest insecurities and send him down a dangerous path.
As Diaz takes a meeting with far-reaching consequences for Star City, Felicity and Curtis work on taking Helix Dynamics to the next level.
Oliver rolls the dice to turn Anatoly against Diaz. Rene returns to the fight as Dinah's team and Diggle join forces to take on the Quadrant.
Oliver faces life in prison as his case plays out in court, but the trial takes an unexpected turn when an old friend makes a surprise appearance.
Facing a coordinated all-out assault, the members of Team Green Arrow reunite to steal data that could break Diaz's iron grip on Star City.
With Star City hanging in the balance, a new ally joins the fight alongside Team Green Arrow as Oliver drives Diaz to an explosive showdown.
While Oliver fights to keep his cool in harsh new surroundings, Felicity comes under fire and a new vigilante posing as Green Arrow hits the streets.
Team Green Arrow reassembles to track down the Longbow Hunters after a theft at A.R.G.U.S. Oliver makes a dicey bargain in Slabside.
Oliver faces a formidable challenge behind bars, Felicity makes her priorities crystal clear, and Curtis creates a technical masterpiece.
Under interrogation, Oliver reconsiders his legacy. While an arsonist burns the Glades, Dinah and Rene lock horns over the new Green Arrow.
Locked in the brutal depths of Slabside, Oliver hatches an escape plan with an old foe. Curtis faces an identity crisis while going undercover.
Over Oliver's objections, Laurel takes up his case. Felicity pushes an undercover op to the edge. Oliver takes a stand for a friend in Slabside.
Putting his freedom in jeopardy, Oliver forces a showdown after Diaz infiltrates Slabside with a ruthless plan for revenge.
After his release from Slabside, Oliver helps Rene and Dinah as they try to learn the identity of the new Green Arrow, who is suspected of murder.
Oliver, Kara and Barry get some unexpected help in their search for answers in Gotham City. Meanwhile, Felicity makes an interdimensional breakthrough.
Rene fights to help the new Green Arrow's mission, and Oliver, now working with the SCPD, finds an unexpected link to the mysterious vigilante.
His father's legacy haunts Oliver's attempt to regain Star City's trust. John pressures Curtis into helping with the revived Ghost Initiative.
While a documentary film crew dogs his steps, Oliver goes on the hunt for a mysterious masked figure who has begun targeting Star City's vigilantes.
Dinah and her freshly deputized crew slip into a horror-movie scenario while chasing a creepy serial killer. William and Oliver clash over their future.
Felicity aims to take out Diaz when Diggle sends the Ghost Initiative after Dante. Oliver steps in as Emiko searches for her mother's killer.
Chafing under new rules, the members of Team Arrow -- now SCPD recruits -- go after a dealer putting chemical weapons on the streets of Star City.
Decades in the future, William and Mia take their perilous quest to the Glades, where they make some disturbing -- and dangerous -- discoveries.
While Team Arrow picks up Dante's trail at last, Laurel clashes with Dinah and Oliver discovers an alarming secret about Emiko's past.
With her criminal history now out in the open, Laurel joins forces with an old acquaintance. Meanwhile, Dinah and Felicity do battle.
After Archer falls into the hands of the Ninth Circle, Diggle calls in some big guns for help -- and must face his family's conflicted past.
Trying to unravel a mystery, the SCPD interrogates Team Arrow after their off-the-books mission to thwart a bio-terrorism attack turns deadly.
While Team Arrow races to rescue him from the rubble of a collapsed building, Oliver faces a moment of truth. Emiko has another surprise in store.
Team Arrow races to thwart Emiko's bioterror attack while Oliver tries to liberate her from their family's cycle of violence. Oliver's debt comes due.
The Dark Archer casts a shadow over a bittersweet family reunion in a parallel universe as Oliver desperately tries to track the dwarf star particles.
With an altered Earth-2 in his rearview and the fate of the multiverse at stake, Oliver gets a new task and reunites with a kick-ass old comrade.
It seems like old times, but much has changed: Thea bonds with Oliver, while John and Lyla team up. Back in the future, Mia takes the lead -- at a cost.
It's not the family reunion that a proud papa would ask for, but Oliver tries to get up to speed. Can he build trust to replace the rage and pain?
Oliver takes his training to the next level and journeys with Mia and Will to a challenging place from his past. Laurel discovers an unexpected ally.
It feels like a rerun -- or an insidious time loop -- when Oliver wakes to find Quentin alive. Now he must find a way to halt the hellish reboot.
Back on Lian Yu, Oliver and the team are charged with building a megaweapon for a space god, all while fighting the nightmarish isleโs army of ghosts.
After revisiting his epic clashes, Oliver joins the fight to save everyone. The Paragons must travel to the dawn of time and face the Anti-Monitor.
When a socialite goes missing, Laurel and Dinah must convince a reluctant Mia to take up her father's mantle to keep chaos from engulfing Star City.
In the aftermath of the Crisis, in an altered world, the survivors regroup, remember and look to the future. But is the mission ever really over?