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When they discover Malcolm's plan, Oliver and Diggle try to stop him but lose Felicity to a police arrest. Meanwhile, Thea learns that Roy is in danger and goes to The Glades, endangering herself as well, while Oliver risks what's left of his friendship with Tommy for the sake of honesty. In the past, Oliver, Shado, and Slade try to stop Fyers from bringing down a passenger jet.moreless
This prelude to Season 2 reviews the events of what happened in the first season.
The Dark Archer visits a seismologist to further The Undertaking. Meanwhile, Laurel makes a decision after Tommy tells her the truth, and Roy and Thea try to find The Hood. In flashback, Fyers tells the captive Oliver, Shado, and Slade of his plans for the missiles and for Yao Fei.
After a battle with Cyrus Gold, Oliver is poisoned and left for dead, and Felicity gives him an antidote that causes hallucinations of his past. Meanwhile, Brother Blood captures Roy, Barry continues assisting Felicity, and Lance loses someone when he tries to run surveillance on Cyrus.
Left with no one but Felicity to rely on, Oliver goes after an accountant and gets a lead on Walter's whereabouts. With Diggle out of his life, Oliver turns to Felicity for help in the field. Meanwhile, Tommy tells Laurel the truth about what he's doing, and Malcolm remembers working with Robert Queen and Frank Chen to alter The Glades forever after the death of his wife.moreless
Oliver must fight to maintain his vow not to take a life when Slade kidnaps someone close to him. Meanwhile, it's Thea who turns to Roy for help, and Diggle takes on ARGUS.
Diggle finds himself working with an unlikely ally when Felicity brings a wounded Oliver to the warehouse. As Oliver's life hangs in the balance he remembers his time on the island when he tried to escape with a new ally, Slade Wilson.
Oliver discovers that Slade is alive and intends to get revenge for Oliver's actions against him on the island. Meanwhile, in flashback Oliver and Sara prepares to take the Amazo, but Sara tells Oliver that he must kill Ivo to keep the doctor from revealing to Slade who is responsible for Shado's death.moreless
As Slade unleashes his wave of Mirakuru-enhanced soldiers on Starling City, Oliver and his team prepare to take them on. Meanwhile, Malcolm returns to town to meet his biological daughter.
Oliver attempts to protect his family after Slade launches the next stage of his plan for revenge for Shado's death and Oliver's betrayal. However, one of Oliver's team questions whether Oliver is seeing clearly. Meanwhile, Isabel schemes to take control of Queen Consolidated.
An assassin attacks Queen Manor in an attempt to kill Black Canary, who has taken refuge there with Oliver's help. Meanwhile, Moira is reluctant to make a guilty plea despite Thea's advice, and Oliver is furious when he discovers that Laurel will be prosecuting his mother in court.
A villain nicknamed the Clock King stalks Starling City, committing precision crimes. Meanwhile, Laurel hosts a dinner party for her family but things go badly, and on the island Sara befriends a dying pilot.
Deadshot is back and working with China White to kill Malcolm Merlyn. While Oliver goes after the two assassins, he struggles to help Tommy resolve his issues with his father and navigate a new relationship with old girlfriend McKenna.
Officer Lance asks the Arrow for help in stopping a serial killer who goes after women, and Felicity volunteers to help. However, when their trap fails, the killer captures Laurel. Meanwhile, DA Adam Donner seeks the death penalty for Moira, and Oliver recruits Roy to help him find the Canary.
Oliver and his team go after Deadshot, only to discover that ARGUS plans to capture the assassin... and recruit him as an operative. Meanwhile, Roy seeks out The Hood while Laurel inadvertently drives a further wedge between Oliver and Tommy. And on the island, Shado teaches Oliver how to use the bow.moreless
Barry travels to Starling City with Caitlin and Cisco, and ends up helping defend Lyla against an assassin determined to get his revenge on her despite Arrow and his friend's best efforts. In the past, Oliver is ordered to acquire information from a prison using whatever means necessary.
Diggle and Felicity go to Lian Yu and convince Oliver to return to Starling City. Upon his return, he finds out that Isabel Rochev wants to take over Queen Consolidated. Thea is refusing to visit her mother in jail, Roy has stepped into Arrow's shoes and Laurel is trying to take down the vigilante. Flashbacks from the island show Shado, Slade, and Oliver in a difficult situation.moreless
When Roy kills a man under the effects of Mirakuru, Oliver and Sara disagree on how to stop hm. Meanwhile, Thea tries to lure Roy to Verdant in the hopes that his feelings for her will let him combat the serum.
Police scientist Barry Allen travels to Starling City to investigate a seemingly impossible robbery from Queen Consolidated's Applied Science Division, and Felicity takes a liking to him... much to Oliver's dismay. Meanwhile, Sin asks Roy for help tracking down a missing friend, and Thea joins her boyfriend in the hunt, only for one of them to be injured.moreless
A new crime lord, the Mayor, arrives in Starling City and starts bring in illegal guns. When Oliver tries to counter with a Cash for Guns event, Black Canary's friend sin is hurt and the female heroine sets out for revenge. Meanwhile, Diggle links up with an old friend and DA Donner asks Laurel out on a date.moreless
Arrow battles Slade, which results in one of his friends going to the hospital. Meanwhile, Thea hits her breaking point, forcing Oliver to choose between her or Slade.
Oliver and Quentin try to convince Sara to stay in Starling City to help Laurel as she tries to deal with her drug addiction. However, Sara soon realizes that she is putting her family in danger when a member of the League of Assassins abducts Dinah and threatens to kill her if Sara doesn't return to the fold.moreless
Bronze Tiger escapes from prison and goes after a prototype of Malcolm's earthquake machine. Meanwhile, Roy refuses to train with Arrow unless the vigilante reveals his true identity, Laurel is disbarred, and Thea tries to get Walter and Moira to reconcile.
Infamous criminal Cyrus Vanch plans to take on The Hood to reestablish his reputation as Starling City's leading crime lord. Meanwhile, Oliver confronts his mother over the copy of the list that Walter found, and Quentin unintentionally endangers Laurel.
Oliver goes after China White and her new partner, Bronze Tiger, when they interdict shipments of medicine intended for a hospital in the Glades. Meanwhile, Officer Lance captures Roy and Thea gives her boyfriend an ultimatum, while Laurel continues her hunt for the Arrow.
A.R.G.U.S. recruits Diggle to rescue Lyla, who has disappeared in Moscow following a lead on Deadshot. Oliver and Felicity volunteer to go with their friend, but run into trouble when Isabel insists on accompanying them. Meanwhile, Moira's attorney suggests that Thea stop dating Roy because it's hurting Moira's defense.
Ra's al Ghul gives Oliver 48 hours to find Sara's murderer... or watch as the League kills 50 citizens a day. Meanwhile, Ray tries to apologize to Felicity for kissing her, and Oliver discovers who Sara's killer is.
Oliver decides the best way to protect everyone in the crossfire is to surrender himself to Slade before his friends are hurt further. When they realize what Oliver plans to do, Diggle and Felicity band together to stop him. Meanwhile, Laurel renews her investigation into Blood's activities, and Thea considers leaving Starling City.moreless
A new vigilante, The Savior, stalks The Glades, killing those that he believes have wronged the residents and broadcasting their deaths online. When The Savior explains that he was inspired by The Hood, Oliver sets out to stop him. Meanwhile, Quentin comes to accept that Dinah is telling the truth and Sarah is still alive, but Laurel isn't so sure.moreless
A deadly illness sweeps through Starling City. When Diggle is struck down, Oliver confirms that the source of the illness is a new version of Vertigo. Tracking down a lead, Felicity is soon captured by The Count, who has escaped prison. Meanwhile, Moira fights for her life in the courtroom against a death sentence, and Laurel is forced to prosecute her when DA Donner is stricken down by the same illness.moreless
A woman at Oliver's club dies of Vertigo and Oliver confirms that The Count is apparently not responsible. However, when The Count escapes, Oliver sets out to bring him in and finds out who is really responsible for the drug distribution. Meanwhile, Quentin gets a lead that takes him to Tommy as the suspected distributor, and Tommy has to take extreme measures to prove his innocence. Meanwhile, on the island, Oliver continues his studies with Slade and Shado.moreless
Laurel reaches out to Arrow for assistance in investigating Sebastian Blood, but he has her arrested for her drug use when she gets too close to his secrets. Meanwhile, Roy almost kills a man when he loses control of his newfound strength. In the past, Sarah tells Oliver a secret about her older sister.moreless
Oliver takes Felicity's advice and asks McKenna out on a date. Meanwhile, Thea befriends a pickpocket named Roy Harper, Moira takes on Malcolm, and a jewel thief who calls himself "Dodger" strikes at one of Oliver's friends.
Oliver and Diggle are at odds when Diggle's former commanding officer is next on the list. Meanwhile, Thea notices when Moira and Malcolm spend time together, while Tommy and Laurel have dinner with Tommy's father.
Oliver hunts down a drug dealer known as "The Count" to prevent the distribution of a new drug known as Vertigo... after Thea has been arrested for using it. While Oliver turns to a former girlfriend and current vice cop for help, Moira defends Thea and Felicity learns more about Moira.moreless
A.R.G.U.S. recruits Diggle to take down a former acquaintance who is now planning to take over Afghanistan. However, he discovers that his new team will consist of three criminals that he formerly put away: Deadshot, Bronze Tiger, and Shrapnel. Meanwhile, Oliver pushes away Sara as he prepares for his battle with Slade.moreless
Now that Arrow has crime in Starling City under control, Oliver tries to have a personal life. However, he and Roy are forced to forgo their personal plans when a new Count Vertigo begins dealing drugs, and a charming scientist makes a bid for Queen Consolidated. Meanwhile, Diggle has a new child, Quentin gets a promotion, and Laurel joins Arrow's crimefighting efforts.moreless
The Huntress returns to town to kill her father, who has been arrested. Oliver promises Sara that he'll stop his ex-girlfriend. However, when Huntress takes a courthouse hostage, including Laurel, Sara steps in. Meanwhile, Roy realizes the cost he must pay to keep Thea safe.
When he discovers that Moira and Thea stopped celebrating Christmas since his disappearance, Oliver tries to throw a Queen Christmas party. Meanwhile, Tommy and Laurel disagree on how they should spend Christmas together.
Oliver's life is going smoothly for once... until the Huntress returns to town. Meanwhile, Thea gets Roy Harper at job at the new club just in time for its opening night, and Laurel and Quentin try to come to grips with Dinah's return.
Oliver meets a kindred spirit: the daughter of a mobster who has her own desire for vengeance. Meanwhile, Tommy turns to Laurel for help.
A new villain, Shrapnel, arrives in Starling City and his next target is Sebastian Blood. With Arrow trapped, Diggle must try and help the alderman. Meanwhile, Thea learns about Roy's new abilities and Laurel investigates the connection between Blood and Cyrus Gold, the man who murdered her father's friend.
Oliver is arrested for murder and insists that Laurel defend him, putting her at odds with her father. However, when Oliver offers to take a polygraph test, Laurel asks him if there was anyone else on the island... and the vigilante remembers his first encounter with the mercenary Deathstroke.
Oliver, his confidence undermined by his defeat at the hands of the Dark Archer, goes up against a psychologically traumatized firefighter. The man has started committing acts of arson while calling himself Firefly. Meanwhile, Thea tries to cheer her mother up and Tommy throws a benefit for the firefighters.
Oliver learns that he is not the only person in Star City that is flying under the radar of the police. An assassin named Deadshot is targeting businessmen bidding on an energy project, and Walter is one of the men involved. Oliver has no choice but to turn to Detective Lance for help to protect his family while he taken on the killer.moreless
Oliver takes Helena under his wing and trains her in the life of a street vigilante. However, Diggle has concerns about Helena, concerns that soon prove true when Helena kills the head of the Triad and puts herself and Oliver at risk.
Nyssa believes that Malcolm is Sara's killer, but Oliver isn't convinced. As they seek the truth, Laurel seeks revenge for her sister's murder and Roy tries to repair his relationship with Thea.
When an off-duty officer is wounded by bank robbers calling themselves the Royal Flush Gang, Diggle tries to convince Oliver that he must do more than go after the men on his father's list. Meanwhile, Tommy asks Thea for dating advice and Moira demands to know why Oliver keeps disappearing.
While on vacation Oliver Queen's ship is destroyed in a storm and he is the only survivor. He finds himself trapped on an island for the next five years. Once he makes it back to Starling City he is reunited with his family and his former girlfriend, but they are unaware that he has changed... and has put the skills he learned to survive on the island to become the vigilante that the city needs.moreless
While juggling his relationship with Laurel, Oliver discovers that one of the men on his list has framed an innocent man. Meanwhile, Thea helps Oliver with Laurel, and Walter has an employee look into a withdrawal that Moira made from the company accounts.
Felicity's mother Donna arrives in Starling City just as a terrorist group calling itself Brother Eye unleashes a wave of cyber-terror on the city. as Felicity struggles to find the villains, she realizes that they're using a computer virus that she created. Meanwhile, Oliver and Thea try to address their differences, and Laurel makes an error of judgment because of her guilt.moreless
Oliver goes to Corto Maltese to bring Thea home, while Lyla asks Diggle to find a missing ARGUS operative. Meanwhile, Ray gives Felicity her first assignment.
Oliver and his team look for Sara's killer and the trail leads to an assassin, Komodo, who is methodically eliminating his targets. While they hunt down the killer, Roy tells Oliver why Thea isn't returning his phone calls. In the past, Maseo informs Oliver that he has to kill Tommy Merlyn.moreless
A corrupt businessman, Martin Somers, hires a Chinese assassin named China White to eliminate Laurel for finding out too much. While protecting Laurel, Oliver is offered the chance to take back control of the company.
A killer frames Ted for multiple murders, and Arrow tries to find out who is really responsible. Meanwhile, Felicity runs a blood test on Roy at his request. In the past, Tatsu reluctantly helps Oliver track down a missing envelope.
Arrow gets a stalker when a woman he once rescued decides to start killing criminals in the hopes that the two of them can be together. Meanwhile, Thea gets a new DJ and Ray invites Felicity out to dinner. In the past, Oliver helps Tatsu when Maseo goes missing.