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.moreless
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.moreless
Twist after twist keeps you guessing as you try to determine the true alliance of Kellog. Meanwhile Alec is forced to make a tough decision between a loved one and Kiera while the mysterious Freelancers agenda starts to become clear.moreless
Travis gets possession of the 2nd tech suit. Emily confesses to Alec as everyone goes after the sphere. Alec finds his "dead" father.
Chaos breaks out in Vancouver when a series of cyber attacks turn the city upside down. Kiera and Carlos race to find the perpetrator while clues suggest Alec's own technology has something to do with it.moreless
After a surprise attack by the Freelancers, Kiera is captured by Julian’s followers. Alec reactivates Travis' military chip in order to hunt him, but the hunter soon becomes the hunted.
Alec’s mother is shot by a bullet meant for Julian while Dillon’s new Liber8 task force is put to the test when Kiera must decide how far she will go to stop Julian's murderous future.moreless
Kiera and Carlos discover that a juror on Julian's trial has been compromised and must race to protect his family from a Liber8 plot. Alec is torn between telling the truth at his brother's trial or protecting his mother. Emily reveals she is more than just a pretty face.moreless
Grace is thrown into general holding, but Mitch continues his investigation. Meanwhile, Alex makes a move to take the leadership and attempts to mend some bridges with him.
The killer: Cameron Radcliffe; the victim: Nathan Conroy.
Detectives Flynn and Vega investigate when the body of a young man is found buried in a densely populated urban neighborhood. The investigation has Angie revisiting her experience as a juror. She must also deal with her feelings as Manny heads off on a trip to Europe.
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
While Liber8 seems to be trying new tactics to win over the public with their messaging, Kiera is alerted to the possibility that there is another Protector's suit like hers that has been activated somewhere in the city. Alec helps her pinpoint it's general location. The race is on when Sonya and Travis discover the CPS suit, too.moreless
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.moreless
Kiera asks for Alec's help when a dangerous drug from the future makes its way onto the streets. Jason warns Kiera about freelancers from the future. Meanwhile, Travis and Sonya fight against each other.moreless
The victim: former boxer Mark "Machine" Mason; the killer: his brother Joey.
"The Machine" is found stabbed to death at the gym he co-owns with his brother Joey, who is wheelchair-bound due to a recent accident. The investigation also involves Mark's wife, Beth, who runs a bar.
Kiera and Carlos's reunion is a bumpy one as they attempt to thwart Liber8's brazen hijacking of a prison transfer. Meanwhile, Kellog approaches Alec with an enticing partnership proposition.
When the mayor is assassinated, Kiera and Carlos join forces once again to try and solve the case. Kiera also reaches out to Alec but he hasn't been the same since reading the message from his future self.moreless
The victim, art gallery employee Julia Conrad; the killer, Marian Reeder.
Julia is found murdered with an antique gun while on her morning jogging route. When the weapon is tracked back to memorabilia collector Owen Reeder, he confesses to the crime. Detective Flynn suspects the confession is false when it is inconsistent with the facts.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
The killer, building contractor Charles Stanwyck; the victim, post-graduate student Taylor Hollis.
When a young man is found murdered, Flynn and Vega follow the leads from a seedy bar where the victim used to deal methamphetamines to a newly renovated Indian restaurant.
The killer: pediatric surgeon Dr. Monika Harper; the victim: news shop owner and ex-military man Hank Cousineau.
Hank is found in the back of his store, dead from having his throat slit. The investigation first centers on a group of young thugs who were trying to extort money from the store owners. Then, the detectives have a look at Hank's camera, which contains dozens of photos of Dr. Monika Harper and her husband and child. They decide to look deeper into Monika's past and discover a secret she has been hiding all her life.
The killer: AA Member Barry Ketchum; the victim: mortgage broker Eric Chase.
When Eric Chase is found strangled outside his office, Detectives Flynn and Vega focus their investigation on his ex-wife, Claudia Powell, an activist who recently lost a custody battle for their son. The investigation eventually leads Angie to Toronto.
The killer: clothing store clerk Chloe Mighten; the victim: health food guru Jack Bergin
When Jack Bergin is was found dead in his hot tub, evidence initially points to an interrupted break-in. Later, Detectives Flynn and Vega discover evidence that the house had been searched and that the home alarm had been turned off and on numerous times that evening.
The killer: Sarah Muller; the victim: high-priced attorney Shawn Mitchell.
Sarah, a grocery store clerk who is involved in a messy divorce and custody battle kills attorney Shawn in what looks like a home robbery gone wrong. As the investigation unfolds, Angie is preoccupied with her son Manny's on vandalism charges.
The killer: cruise ship terminal customs agent Ben Crewson; the victim: limousine driver Scott Hayward.
When Scott Hayward is found dead in Stanley Park from a single gunshot wound, Detectives Flynn and Vega focus on his last ride, weekly regular Randy Sprague. His route never varied, except for the night of the murder, when it ended with in Stanley Park with Hayward dead.
The killer: mayoral candidate David Jacobs; the victim: high school student Tiffany Greenwood.
Former prosecutor David Jacobs is a popular mayoral candidate. Four weeks before election day, 17-year old Tiffany Greenwood, an occasional babysitter for David and his wife, is killed in a hit and run accident with her ex-boyfriend's car. As the investigation proceeds, Detectives Flynn and Vega wonder why David, in an unofficial capacity, is over-zealously pushing for the ex-boyfriend's prosecution.
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.moreless
The killer: Tom, a high school student; the victim: Glen Martin, a popular singing science teacher at Tom's high school.
Tom, a quiet student, enjoys being invisible so that he can engage in his favorite activity of creeping; breaking into people's homes just for the fun of it.
Oliver meets a kindred spirit: the daughter of a mobster who has her own desire for vengeance. Meanwhile, Tommy turns to Laurel for help.